| 1 Jan, 2023 (Sun) | New Year's Day | State Holiday |
| 1 Jan, 2023 (Sun) | New Year's Day | Federal Holiday |
| 2 Jan, 2023 (Mon) | New Year's Day (substitute) | State Holiday |
| 2 Jan, 2023 (Mon) | New Year's Day (substitute) | Federal Holiday |
| 3 Jan, 2023 (Tue) | Asarah B'Tevet | Jewish holiday |
| 4 Jan, 2023 (Wed) | World Braille Day | United Nations observance |
| 6 Jan, 2023 (Fri) | Epiphany | Christian |
| 7 Jan, 2023 (Sat) | Orthodox Christmas Day | Orthodox |
| 7 Jan, 2023 (Sat) | International Programmers' Day | Worldwide observance |
| 7 Jan, 2023 (Sat) | Estelle Reel Day | State Observance |
| 8 Jan, 2023 (Sun) | Battle of New Orleans | State Legal Holiday |
| 13 Jan, 2023 (Fri) | Friday the 13th | Worldwide observance |
| 13 Jan, 2023 (Fri) | Stephen Foster Memorial Day | Observance |
| 14 Jan, 2023 (Sat) | Orthodox New Year | Orthodox |
| 15 Jan, 2023 (Sun) | World Religion Day | Worldwide observance |
| 16 Jan, 2023 (Mon) | Martin Luther King Jr. Day | State Holiday |
| 16 Jan, 2023 (Mon) | Martin Luther King Jr. Day | Federal Holiday |
| 16 Jan, 2023 (Mon) | Robert E. Lee's Birthday | State Holiday |
| 16 Jan, 2023 (Mon) | Idaho Human Rights Day | State Holiday |
| 16 Jan, 2023 (Mon) | Civil Rights Day | State Holiday |
| 19 Jan, 2023 (Thu) | Robert E. Lee's Birthday | State Legal Holiday |
| 19 Jan, 2023 (Thu) | State Holiday | State Observance |
| 19 Jan, 2023 (Thu) | Confederate Heroes' Day | State Holiday |
| 22 Jan, 2023 (Sun) | Lunar New Year | Observance |
| 24 Jan, 2023 (Tue) | International Day of Education | United Nations observance |
| 26 Jan, 2023 (Thu) | International Customs Day | Worldwide observance |
| 27 Jan, 2023 (Fri) | International Day of Commemoration in Memory of the Victims of the Holocaust | United Nations observance |
| 29 Jan, 2023 (Sun) | World Leprosy Day | Worldwide observance |
| 29 Jan, 2023 (Sun) | Kansas Day | State Observance |
| 1 Feb, 2023 (Wed) | National Freedom Day | Observance |
| 1 Feb, 2023 (Wed) | National Girls and Women in Sports Day | Observance |
| 1 Feb, 2023 (Wed) | First Day of Black History Month | Annual Monthly Observance |
| 2 Feb, 2023 (Thu) | World Wetlands Day | Worldwide observance |
| 2 Feb, 2023 (Thu) | Groundhog Day | Observance |
| 3 Feb, 2023 (Fri) | National Wear Red Day | Observance |
| 4 Feb, 2023 (Sat) | International Day of Human Fraternity | United Nations observance |
| 4 Feb, 2023 (Sat) | World Cancer Day | Worldwide observance |
| 4 Feb, 2023 (Sat) | Rosa Parks Day | Local observance |
| 4 Feb, 2023 (Sat) | Rosa Parks Day | State Observance |
| 6 Feb, 2023 (Mon) | Tu Bishvat/Tu B'Shevat | Jewish holiday |
| 6 Feb, 2023 (Mon) | International Day of Zero Tolerance for Female Genital Mutilation | United Nations observance |
| 6 Feb, 2023 (Mon) | Ronald Reagan Day | State Observance |
| 10 Feb, 2023 (Fri) | World Pulses Day | United Nations observance |
| 11 Feb, 2023 (Sat) | International Day of Women and Girls in Science | United Nations observance |
| 11 Feb, 2023 (Sat) | World Day of the Sick | Worldwide observance |
| 12 Feb, 2023 (Sun) | Lincoln's Birthday | State Holiday |
| 12 Feb, 2023 (Sun) | Lincoln's Birthday | State Legal Holiday |
| 12 Feb, 2023 (Sun) | Georgia Day | State Observance |
| 12 Feb, 2023 (Sun) | Super Bowl | Sporting event |
| 13 Feb, 2023 (Mon) | World Radio Day | United Nations observance |
| 13 Feb, 2023 (Mon) | Lincoln's Birthday observed | State Holiday |
| 14 Feb, 2023 (Tue) | Valentine's Day | Observance |
| 14 Feb, 2023 (Tue) | Statehood Day | Local observance |
| 15 Feb, 2023 (Wed) | Susan B. Anthony's Birthday | State Observance |
| 16 Feb, 2023 (Thu) | Elizabeth Peratrovich Day | State Observance |
| 18 Feb, 2023 (Sat) | Maha Shivaratri | Hindu Holiday |
| 18 Feb, 2023 (Sat) | Isra and Mi'raj | Muslim |
| 20 Feb, 2023 (Mon) | World Day of Social Justice | United Nations observance |
| 20 Feb, 2023 (Mon) | Presidents' Day | Federal Holiday |
| 20 Feb, 2023 (Mon) | Presidents' Day | State Holiday |
| 20 Feb, 2023 (Mon) | Presidents' Day | State Legal Holiday |
| 20 Feb, 2023 (Mon) | Daisy Gatson Bates Day | State Holiday |
| 21 Feb, 2023 (Tue) | International Mother Language Day | United Nations observance |
| 21 Feb, 2023 (Tue) | Shrove Tuesday/Mardi Gras | State Holiday |
| 21 Feb, 2023 (Tue) | Shrove Tuesday/Mardi Gras | Observance, Christian |
| 22 Feb, 2023 (Wed) | Ash Wednesday | Christian |
| 25 Feb, 2023 (Sat) | African-American Scientist and Inventor Day | State Observance |
| 25 Feb, 2023 (Sat) | George Rogers Clark Day | State Observance |
| 28 Feb, 2023 (Tue) | Linus Pauling Day | Local observance |
| 1 Mar, 2023 (Wed) | Zero Discrimination Day | United Nations observance |
| 1 Mar, 2023 (Wed) | Self-Injury Awareness Day | Worldwide observance |
| 1 Mar, 2023 (Wed) | St. David's Day | Observance, Christian |
| 1 Mar, 2023 (Wed) | First Day of Women's History Month | Annual Monthly Observance |
| 1 Mar, 2023 (Wed) | First Day of Irish American Heritage Month | Annual Monthly Observance |
| 2 Mar, 2023 (Thu) | Texas Independence Day | State Holiday |
| 2 Mar, 2023 (Thu) | Read Across America Day | Observance |
| 3 Mar, 2023 (Fri) | World Wildlife Day | United Nations observance |
| 3 Mar, 2023 (Fri) | Employee Appreciation Day | Observance |
| 4 Mar, 2023 (Sat) | Casimir Pulaski Day | State Observance |
| 6 Mar, 2023 (Mon) | Casimir Pulaski Day | State Observance |
| 7 Mar, 2023 (Tue) | Holi | Hindu Holiday |
| 7 Mar, 2023 (Tue) | Purim | Jewish holiday |
| 7 Mar, 2023 (Tue) | Town Meeting Day | State Holiday |
| 8 Mar, 2023 (Wed) | International Women's Day | United Nations observance |
| 9 Mar, 2023 (Thu) | World Kidney Day | Worldwide observance |
| 10 Mar, 2023 (Fri) | International Day of Women Judges | United Nations observance |
| 12 Mar, 2023 (Sun) | Daylight Saving Time starts | Clock change/Daylight Saving Time |
| 15 Mar, 2023 (Wed) | Long Covid Awareness Day | Worldwide observance |
| 17 Mar, 2023 (Fri) | St. Patrick's Day | Observance, Christian |
| 17 Mar, 2023 (Fri) | Evacuation Day | State Holiday |
| 20 Mar, 2023 (Mon) | French Language Day | United Nations observance |
| 20 Mar, 2023 (Mon) | International Day of Happiness | United Nations observance |
| 20 Mar, 2023 (Mon) | March Equinox | Season |
| 21 Mar, 2023 (Tue) | International Day for the Elimination of Racial Discrimination | United Nations observance |
| 21 Mar, 2023 (Tue) | World Poetry Day | United Nations observance |
| 21 Mar, 2023 (Tue) | International Day of Nowruz | United Nations observance |
| 21 Mar, 2023 (Tue) | World Down Syndrome Day | United Nations observance |
| 21 Mar, 2023 (Tue) | International Day of Forests | United Nations observance |
| 22 Mar, 2023 (Wed) | World Water Day | United Nations observance |
| 23 Mar, 2023 (Thu) | Ramadan Starts | Muslim |
| 23 Mar, 2023 (Thu) | World Meteorological Day | United Nations observance |
| 24 Mar, 2023 (Fri) | World Tuberculosis Day | United Nations observance |
| 24 Mar, 2023 (Fri) | International Day for the Right to the Truth concerning Gross Human Rights Violations and for the Dignity of Victims | United Nations observance |
| 25 Mar, 2023 (Sat) | International Day of Remembrance of Slavery Victims and the Transatlantic Slave Trade | United Nations observance |
| 25 Mar, 2023 (Sat) | International Day of Solidarity with Detained and Missing Staff Members | United Nations observance |
| 25 Mar, 2023 (Sat) | Earth Hour | Worldwide observance |
| 25 Mar, 2023 (Sat) | Maryland Day | Local observance |
| 26 Mar, 2023 (Sun) | Prince Jonah Kuhio Kalanianaole Day | State Holiday |
| 27 Mar, 2023 (Mon) | Prince Jonah Kuhio Kalanianaole Day observed | State Holiday |
| 27 Mar, 2023 (Mon) | Seward's Day | State Holiday |
| 29 Mar, 2023 (Wed) | National Vietnam War Veterans Day | Observance |
| 30 Mar, 2023 (Thu) | Wyoming Veterans Welcome Home Day | State Observance |
| 30 Mar, 2023 (Thu) | Doctors' Day | Observance |
| 30 Mar, 2023 (Thu) | Vietnam Veterans Day | State Observance |
| 31 Mar, 2023 (Fri) | International Transgender Day of Visibility | Worldwide observance |
| 31 Mar, 2023 (Fri) | César Chávez Day | State Holiday |
| 1 Apr, 2023 (Sat) | April Fool's Day | Worldwide observance |
| 2 Apr, 2023 (Sun) | Palm Sunday | Christian |
| 2 Apr, 2023 (Sun) | World Autism Awareness Day | United Nations observance |
| 2 Apr, 2023 (Sun) | Pascua Florida Day | Local observance |
| 3 Apr, 2023 (Mon) | Pascua Florida Day observed | Local observance |
| 4 Apr, 2023 (Tue) | United Nations' Mine Awareness Day | United Nations observance |
| 5 Apr, 2023 (Wed) | Passover Eve | Jewish holiday |
| 5 Apr, 2023 (Wed) | International Day of Conscience | United Nations observance |
| 6 Apr, 2023 (Thu) | Maundy Thursday | Christian |
| 6 Apr, 2023 (Thu) | Passover (first day) | Jewish holiday |
| 6 Apr, 2023 (Thu) | International Day of Sport for Development and Peace | United Nations observance |
| 6 Apr, 2023 (Thu) | National Tartan Day | Observance |
| 7 Apr, 2023 (Fri) | United Nations' World Health Day | United Nations observance |
| 7 Apr, 2023 (Fri) | Day of Remembrance of the Victims of the Rwanda Genocide | United Nations observance |
| 7 Apr, 2023 (Fri) | Good Friday | State Holiday |
| 7 Apr, 2023 (Fri) | State Holiday | State Holiday |
| 8 Apr, 2023 (Sat) | Holy Saturday | Christian |
| 9 Apr, 2023 (Sun) | Easter Sunday | Observance, Christian |
| 10 Apr, 2023 (Mon) | Easter Monday | Observance, Christian |
| 12 Apr, 2023 (Wed) | International Day of Human Space Flight | United Nations observance |
| 13 Apr, 2023 (Thu) | Last Day of Passover | Jewish holiday |
| 13 Apr, 2023 (Thu) | Thomas Jefferson's Birthday | Observance |
| 14 Apr, 2023 (Fri) | Orthodox Good Friday | Orthodox |
| 14 Apr, 2023 (Fri) | World Chagas Disease Day | United Nations observance |
| 15 Apr, 2023 (Sat) | Orthodox Holy Saturday | Orthodox |
| 15 Apr, 2023 (Sat) | World Art Day | Worldwide observance |
| 15 Apr, 2023 (Sat) | Father Damien Day | Local observance |
| 16 Apr, 2023 (Sun) | Orthodox Easter | Orthodox |
| 16 Apr, 2023 (Sun) | Emancipation Day | State Holiday |
| 17 Apr, 2023 (Mon) | Lailat al-Qadr | Muslim |
| 17 Apr, 2023 (Mon) | Orthodox Easter Monday | Orthodox |
| 17 Apr, 2023 (Mon) | Emancipation Day observed | State Holiday |
| 17 Apr, 2023 (Mon) | Patriots' Day | State Holiday |
| 17 Apr, 2023 (Mon) | Boston Marathon | Sporting event |
| 18 Apr, 2023 (Tue) | Yom HaShoah | Jewish commemoration |
| 18 Apr, 2023 (Tue) | International Day for Monuments and Sites | Worldwide observance |
| 18 Apr, 2023 (Tue) | Tax Day | Observance |
| 20 Apr, 2023 (Thu) | Chinese Language Day | United Nations observance |
| 21 Apr, 2023 (Fri) | Eid al-Fitr | Muslim |
| 21 Apr, 2023 (Fri) | World Creativity and Innovation Day | United Nations observance |
| 21 Apr, 2023 (Fri) | San Jacinto Day | State Holiday |
| 21 Apr, 2023 (Fri) | Arbor Day | State Observance |
| 22 Apr, 2023 (Sat) | Earth Day | United Nations observance |
| 22 Apr, 2023 (Sat) | Oklahoma Day | Local observance |
| 23 Apr, 2023 (Sun) | World Book and Copyright Day | United Nations observance |
| 23 Apr, 2023 (Sun) | English Language Day | United Nations observance |
| 24 Apr, 2023 (Mon) | International Day of Multilateralism and Diplomacy for Peace | United Nations observance |
| 24 Apr, 2023 (Mon) | Arbor Day | State Observance |
| 24 Apr, 2023 (Mon) | Confederate Memorial Day | State Holiday |
| 25 Apr, 2023 (Tue) | International Delegate's Day | United Nations observance |
| 25 Apr, 2023 (Tue) | World Malaria Day | United Nations observance |
| 25 Apr, 2023 (Tue) | National Library Workers' Day | Observance |
| 26 Apr, 2023 (Wed) | Yom Ha'atzmaut | Jewish holiday |
| 26 Apr, 2023 (Wed) | World Intellectual Property Day | United Nations observance |
| 26 Apr, 2023 (Wed) | International Chernobyl Disaster Remembrance Day | United Nations observance |
| 26 Apr, 2023 (Wed) | Confederate Memorial Day | State Legal Holiday |
| 26 Apr, 2023 (Wed) | State Holiday | State Observance |
| 26 Apr, 2023 (Wed) | Administrative Professionals Day | Observance |
| 27 Apr, 2023 (Thu) | International Girls in ICT Day | United Nations observance |
| 27 Apr, 2023 (Thu) | Take our Daughters and Sons to Work Day | Observance |
| 28 Apr, 2023 (Fri) | World Day for Safety and Health at Work | United Nations observance |
| 28 Apr, 2023 (Fri) | Arbor Day | State Holiday |
| 28 Apr, 2023 (Fri) | Arbor Day | State Observance |
| 30 Apr, 2023 (Sun) | International Jazz Day | United Nations observance |
| 1 May, 2023 (Mon) | Law Day | Observance |
| 1 May, 2023 (Mon) | Loyalty Day | Observance |
| 1 May, 2023 (Mon) | Lei Day | Local observance |
| 1 May, 2023 (Mon) | First Day of Military Appreciation Month | Annual Monthly Observance |
| 1 May, 2023 (Mon) | First Day of Asian Pacific American Heritage Month | Annual Monthly Observance |
| 1 May, 2023 (Mon) | First Day of Jewish American Heritage Month | Annual Monthly Observance |
| 2 May, 2023 (Tue) | World Tuna Day | United Nations observance |
| 2 May, 2023 (Tue) | National Teacher Appreciation Day | Observance |
| 3 May, 2023 (Wed) | World Press Freedom Day | United Nations observance |
| 4 May, 2023 (Thu) | Kent State Shootings Remembrance | Local observance |
| 4 May, 2023 (Thu) | National Day of Prayer | Observance |
| 4 May, 2023 (Thu) | Rhode Island Independence Day | Local observance |
| 4 May, 2023 (Thu) | West Virginia Day of Prayer | State Observance |
| 5 May, 2023 (Fri) | Day of Vesak | United Nations observance |
| 5 May, 2023 (Fri) | World Portuguese Language Day | United Nations observance |
| 5 May, 2023 (Fri) | Cinco de Mayo | Observance |
| 5 May, 2023 (Fri) | Kentucky Oaks | Sporting event |
| 6 May, 2023 (Sat) | Kentucky Derby | Sporting event |
| 6 May, 2023 (Sat) | National Nurses Day | Observance |
| 6 May, 2023 (Sat) | National Explosive Ordnance Disposal (EOD) Day | Observance |
| 7 May, 2023 (Sun) | International Family Equality Day | Worldwide observance |
| 8 May, 2023 (Mon) | Time of Remembrance and Reconciliation for Those Who Lost Their Lives during the Second World War | United Nations observance |
| 8 May, 2023 (Mon) | World Ovarian Cancer Day | Worldwide observance |
| 8 May, 2023 (Mon) | World Red Cross and Red Crescent Day | Worldwide observance |
| 8 May, 2023 (Mon) | Truman Day | State Holiday |
| 8 May, 2023 (Mon) | Victory in Europe Day | Observance |
| 9 May, 2023 (Tue) | Lag BaOmer | Jewish holiday |
| 10 May, 2023 (Wed) | International Day of Argania | United Nations observance |
| 10 May, 2023 (Wed) | Confederate Memorial Day | State Holiday |
| 10 May, 2023 (Wed) | Confederate Memorial Day | Local observance |
| 12 May, 2023 (Fri) | International Nurses Day | Worldwide observance |
| 12 May, 2023 (Fri) | Native American Day | State Observance |
| 12 May, 2023 (Fri) | Military Spouse Appreciation Day | Observance |
| 12 May, 2023 (Fri) | Military Spouse Appreciation Day | State Observance |
| 13 May, 2023 (Sat) | World Migratory Bird Day | United Nations observance |
| 14 May, 2023 (Sun) | Mother's Day | Observance |
| 14 May, 2023 (Sun) | Mother's Day | State Holiday |
| 15 May, 2023 (Mon) | International Day of Families | United Nations observance |
| 15 May, 2023 (Mon) | Peace Officers Memorial Day | Observance |
| 16 May, 2023 (Tue) | International Day of Living Together in Peace | United Nations observance |
| 16 May, 2023 (Tue) | International Day of Light | United Nations observance |
| 17 May, 2023 (Wed) | World Telecommunication and Information Society Day | United Nations observance |
| 18 May, 2023 (Thu) | Ascension Day | Christian |
| 19 May, 2023 (Fri) | National Defense Transportation Day | Observance |
| 20 May, 2023 (Sat) | World Bee Day | United Nations observance |
| 20 May, 2023 (Sat) | World Autoimmune / Autoinflammatory Arthritis Day | Worldwide observance |
| 20 May, 2023 (Sat) | Public Lands Day | State Observance |
| 20 May, 2023 (Sat) | Armed Forces Day | Observance |
| 20 May, 2023 (Sat) | Preakness Stakes | Sporting event |
| 21 May, 2023 (Sun) | World Day for Cultural Diversity for Dialogue and Development | United Nations observance |
| 21 May, 2023 (Sun) | International Tea Day | United Nations observance |
| 22 May, 2023 (Mon) | International Day for Biological Diversity | United Nations observance |
| 22 May, 2023 (Mon) | National Maritime Day | Observance |
| 22 May, 2023 (Mon) | Harvey Milk Day | Local observance |
| 23 May, 2023 (Tue) | International Day to End Obstetric Fistula | United Nations observance |
| 24 May, 2023 (Wed) | Emergency Medical Services for Children Day | Observance |
| 25 May, 2023 (Thu) | African Liberation Day | Worldwide observance |
| 25 May, 2023 (Thu) | National Missing Children's Day | Observance |
| 26 May, 2023 (Fri) | Shavuot | Jewish holiday |
| 28 May, 2023 (Sun) | Pentecost | Christian |
| 29 May, 2023 (Mon) | Whit Monday | Christian |
| 29 May, 2023 (Mon) | International Day of United Nations Peacekeepers | United Nations observance |
| 29 May, 2023 (Mon) | Memorial Day | Federal Holiday |
| 29 May, 2023 (Mon) | Decoration Day | State Holiday |
| 29 May, 2023 (Mon) | Jefferson Davis' Birthday | Local observance |
| 31 May, 2023 (Wed) | World No Tobacco Day | United Nations observance |
| 1 Jun, 2023 (Thu) | Global Day of Parents | United Nations observance |
| 1 Jun, 2023 (Thu) | First Day of Pride Month | Annual Monthly Observance |
| 1 Jun, 2023 (Thu) | First Day of Caribbean-American Heritage Month | Annual Monthly Observance |
| 1 Jun, 2023 (Thu) | Statehood Day | Local observance |
| 3 Jun, 2023 (Sat) | World Bicycle Day | United Nations observance |
| 3 Jun, 2023 (Sat) | Jefferson Davis' Birthday | Local observance |
| 4 Jun, 2023 (Sun) | Trinity Sunday | Christian |
| 4 Jun, 2023 (Sun) | International Day of Innocent Children Victims of Aggression | United Nations observance |
| 4 Jun, 2023 (Sun) | Native American Day | State Holiday |
| 5 Jun, 2023 (Mon) | World Environment Day | United Nations observance |
| 5 Jun, 2023 (Mon) | International Day for the Fight against Illegal, Unreported and Unregulated Fishing | United Nations observance |
| 5 Jun, 2023 (Mon) | Jefferson Davis' Birthday | State Holiday |
| 6 Jun, 2023 (Tue) | Day of the Russian Language | United Nations observance |
| 6 Jun, 2023 (Tue) | D-Day | Observance |
| 7 Jun, 2023 (Wed) | World Food Safety Day | United Nations observance |
| 8 Jun, 2023 (Thu) | Corpus Christi | Christian |
| 8 Jun, 2023 (Thu) | World Oceans Day | United Nations observance |
| 10 Jun, 2023 (Sat) | Belmont Stakes | Sporting event |
| 11 Jun, 2023 (Sun) | Kamehameha Day | State Holiday |
| 12 Jun, 2023 (Mon) | World Day Against Child Labour | United Nations observance |
| 12 Jun, 2023 (Mon) | Kamehameha Day observed | State Holiday |
| 12 Jun, 2023 (Mon) | Loving Day | Observance |
| 13 Jun, 2023 (Tue) | International Albinism Awareness Day | United Nations observance |
| 14 Jun, 2023 (Wed) | World Blood Donor Day | United Nations observance |
| 14 Jun, 2023 (Wed) | Army Birthday | Observance |
| 14 Jun, 2023 (Wed) | Flag Day | Observance |
| 15 Jun, 2023 (Thu) | World Elder Abuse Awareness Day | United Nations observance |
| 16 Jun, 2023 (Fri) | International Day of Family Remittances | United Nations observance |
| 16 Jun, 2023 (Fri) | Juneteenth | State Holiday |
| 16 Jun, 2023 (Fri) | Juneteenth Day | State Holiday |
| 17 Jun, 2023 (Sat) | World Day to Combat Desertification and Drought | United Nations observance |
| 17 Jun, 2023 (Sat) | Bunker Hill Day | Local holiday |
| 17 Jun, 2023 (Sat) | Juneteenth Day | State Observance |
| 18 Jun, 2023 (Sun) | Sustainable Gastronomy Day | United Nations observance |
| 18 Jun, 2023 (Sun) | Father's Day | Observance |
| 18 Jun, 2023 (Sun) | Father's Day | State Holiday |
| 19 Jun, 2023 (Mon) | International Day for the Elimination of Sexual Violence in Conflict | United Nations observance |
| 19 Jun, 2023 (Mon) | Juneteenth | Federal Holiday |
| 19 Jun, 2023 (Mon) | Juneteenth National Freedom Day | State Observance |
| 19 Jun, 2023 (Mon) | Juneteenth National Freedom Day | State Holiday |
| 19 Jun, 2023 (Mon) | Juneteenth | State Observance |
| 19 Jun, 2023 (Mon) | Juneteenth Independence Day | Observance |
| 19 Jun, 2023 (Mon) | Emancipation Day | State Holiday |
| 20 Jun, 2023 (Tue) | World Refugee Day | United Nations observance |
| 20 Jun, 2023 (Tue) | West Virginia Day | State Holiday |
| 20 Jun, 2023 (Tue) | American Eagle Day | Observance |
| 21 Jun, 2023 (Wed) | International Day of Yoga | United Nations observance |
| 21 Jun, 2023 (Wed) | International Day of the Celebration of the Solstice | United Nations observance |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 23 Jun, 2023 (Fri) | Public Service Day | United Nations observance |
| 23 Jun, 2023 (Fri) | International Widows' Day | United Nations observance |
| 25 Jun, 2023 (Sun) | Day of the Seafarer | United Nations observance |
| 26 Jun, 2023 (Mon) | International Day Against Drug Abuse and Illicit Trafficking | United Nations observance |
| 26 Jun, 2023 (Mon) | International Day in Support of Victims of Torture | United Nations observance |
| 27 Jun, 2023 (Tue) | Micro-, Small and Medium-sized Enterprises Day | United Nations observance |
| 28 Jun, 2023 (Wed) | Eid al-Adha | Muslim |
| 28 Jun, 2023 (Wed) | Carolina Day | State Observance |
| 29 Jun, 2023 (Thu) | International Day of the Tropics | United Nations observance |
| 30 Jun, 2023 (Fri) | International Asteroid Day | United Nations observance |
| 30 Jun, 2023 (Fri) | International Day of Parliamentarism | United Nations observance |
| 1 Jul, 2023 (Sat) | International Day of Cooperatives | United Nations observance |
| 3 Jul, 2023 (Mon) | Independence Day Holiday | State Holiday |
| 4 Jul, 2023 (Tue) | Independence Day | State Holiday |
| 4 Jul, 2023 (Tue) | Independence Day | Federal Holiday |
| 11 Jul, 2023 (Tue) | World Population Day | United Nations observance |
| 13 Jul, 2023 (Thu) | Nathan Bedford Forrest Day | Local observance |
| 14 Jul, 2023 (Fri) | Bastille Day | Observance |
| 15 Jul, 2023 (Sat) | World Youth Skills Day | United Nations observance |
| 16 Jul, 2023 (Sun) | Rural Transit Day | Observance |
| 18 Jul, 2023 (Tue) | Nelson Mandela Day | United Nations observance |
| 19 Jul, 2023 (Wed) | Muharram | Muslim |
| 20 Jul, 2023 (Thu) | World Chess Day | United Nations observance |
| 23 Jul, 2023 (Sun) | Parents' Day | Observance |
| 24 Jul, 2023 (Mon) | Pioneer Day | State Holiday |
| 25 Jul, 2023 (Tue) | World Drowning Prevention Day | United Nations observance |
| 27 Jul, 2023 (Thu) | Tisha B'Av | Jewish holiday |
| 27 Jul, 2023 (Thu) | Korean War Veteran Recognition Day | State Observance |
| 27 Jul, 2023 (Thu) | National Korean War Veterans Armistice Day | Observance |
| 28 Jul, 2023 (Fri) | Ashura | Muslim |
| 28 Jul, 2023 (Fri) | World Hepatitis Day | United Nations observance |
| 30 Jul, 2023 (Sun) | International Day of Friendship | United Nations observance |
| 30 Jul, 2023 (Sun) | World Day Against Trafficking in Persons | United Nations observance |
| 1 Aug, 2023 (Tue) | Colorado Day | State Observance |
| 4 Aug, 2023 (Fri) | Coast Guard Birthday | Observance |
| 4 Aug, 2023 (Fri) | Barack Obama Day | Observance |
| 6 Aug, 2023 (Sun) | American Family Day | State Holiday |
| 7 Aug, 2023 (Mon) | Purple Heart Day | State Observance |
| 7 Aug, 2023 (Mon) | Purple Heart Day | Observance |
| 9 Aug, 2023 (Wed) | International Day of the World's Indigenous People | United Nations observance |
| 12 Aug, 2023 (Sat) | International Youth Day | United Nations observance |
| 14 Aug, 2023 (Mon) | Victory Day | State Holiday |
| 15 Aug, 2023 (Tue) | Assumption of Mary | Christian |
| 16 Aug, 2023 (Wed) | Bennington Battle Day | State Holiday |
| 18 Aug, 2023 (Fri) | Hawaii Statehood Day | State Holiday |
| 19 Aug, 2023 (Sat) | World Humanitarian Day | United Nations observance |
| 19 Aug, 2023 (Sat) | National Aviation Day | Observance |
| 20 Aug, 2023 (Sun) | National Navajo Code Talkers Day | State Holiday |
| 20 Aug, 2023 (Sun) | National Senior Citizens Day | Observance |
| 21 Aug, 2023 (Mon) | International Day of Remembrance of and Tribute to the Victims of Terrorism | United Nations observance |
| 22 Aug, 2023 (Tue) | International Day Commemorating the Victims of Acts of Violence Based on Religion or Belief | United Nations observance |
| 23 Aug, 2023 (Wed) | International Day for the Remembrance of the Slave Trade and its Abolition | United Nations observance |
| 26 Aug, 2023 (Sat) | Susan B. Anthony Day | State Observance |
| 26 Aug, 2023 (Sat) | Women's Equality Day | Observance |
| 27 Aug, 2023 (Sun) | Lyndon Baines Johnson Day | State Holiday |
| 29 Aug, 2023 (Tue) | International Day against Nuclear Tests | United Nations observance |
| 30 Aug, 2023 (Wed) | Raksha Bandhan | Hindu Holiday |
| 30 Aug, 2023 (Wed) | International Day of the Victims of Enforced Disappearances | United Nations observance |
| 31 Aug, 2023 (Thu) | International Day for People of African Descent | United Nations observance |
| 31 Aug, 2023 (Thu) | International Overdose Awareness Day | Worldwide observance |
| 4 Sep, 2023 (Mon) | World Sexual Health Day | Worldwide observance |
| 4 Sep, 2023 (Mon) | Labor Day | Federal Holiday |
| 4 Sep, 2023 (Mon) | Labor Day | State Holiday |
| 5 Sep, 2023 (Tue) | International Day of Charity | United Nations observance |
| 6 Sep, 2023 (Wed) | Janmashtami | Hindu Holiday |
| 7 Sep, 2023 (Thu) | International Day of Clean Air for Blue Skies | United Nations observance |
| 7 Sep, 2023 (Thu) | Still's Disease Awareness Day | Worldwide observance |
| 8 Sep, 2023 (Fri) | International Literacy Day | United Nations observance |
| 9 Sep, 2023 (Sat) | International Day to Protect Education from Attack | United Nations observance |
| 9 Sep, 2023 (Sat) | Carl Garner Federal Lands Cleanup Day | Observance |
| 9 Sep, 2023 (Sat) | Native American Day | State Observance |
| 9 Sep, 2023 (Sat) | California Admission Day | State Holiday |
| 10 Sep, 2023 (Sun) | World Suicide Prevention Day | Worldwide observance |
| 10 Sep, 2023 (Sun) | National Grandparents Day | Observance |
| 11 Sep, 2023 (Mon) | First Responders Day | State Observance |
| 11 Sep, 2023 (Mon) | Patriot Day | State Observance |
| 11 Sep, 2023 (Mon) | Patriot Day | Observance |
| 12 Sep, 2023 (Tue) | International Day for South-South Cooperation | United Nations observance |
| 13 Sep, 2023 (Wed) | International Programmers' Day | Worldwide observance |
| 15 Sep, 2023 (Fri) | International Day of Democracy | United Nations observance |
| 15 Sep, 2023 (Fri) | First Day of National Hispanic Heritage Month | Annual Monthly Observance |
| 15 Sep, 2023 (Fri) | National POW/MIA Recognition Day | Observance |
| 16 Sep, 2023 (Sat) | Rosh Hashana | Jewish holiday |
| 16 Sep, 2023 (Sat) | International Day for the Preservation of the Ozone Layer | United Nations observance |
| 16 Sep, 2023 (Sat) | Rosh Hashana | State Holiday |
| 17 Sep, 2023 (Sun) | World Patient Safety Day | United Nations observance |
| 17 Sep, 2023 (Sun) | Constitution Day and Citizenship Day | Observance |
| 17 Sep, 2023 (Sun) | Constitution Commemoration Day | State Holiday |
| 18 Sep, 2023 (Mon) | Ganesh Chaturthi | Hindu Holiday |
| 18 Sep, 2023 (Mon) | International Equal Pay Day | United Nations observance |
| 18 Sep, 2023 (Mon) | Air Force Birthday | Observance |
| 18 Sep, 2023 (Mon) | Constitution Day and Citizenship Day observed | Observance |
| 21 Sep, 2023 (Thu) | International Day of Peace | United Nations observance |
| 22 Sep, 2023 (Fri) | Emancipation Day | Local observance |
| 22 Sep, 2023 (Fri) | Native American Day | State Observance |
| 22 Sep, 2023 (Fri) | Michigan Indian Day | State Observance |
| 23 Sep, 2023 (Sat) | International Day of Sign Languages | United Nations observance |
| 23 Sep, 2023 (Sat) | International Celebrate Bisexuality Day | Worldwide observance |
| 23 Sep, 2023 (Sat) | Public Lands Day | State Observance |
| 23 Sep, 2023 (Sat) | National Public Lands Day | Observance |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 24 Sep, 2023 (Sun) | Gold Star Mother's Day | Observance |
| 25 Sep, 2023 (Mon) | Yom Kippur | Jewish holiday |
| 25 Sep, 2023 (Mon) | American Indian Day | State Observance |
| 25 Sep, 2023 (Mon) | Yom Kippur | State Holiday |
| 26 Sep, 2023 (Tue) | International Day for the Total Elimination of Nuclear Weapons | United Nations observance |
| 27 Sep, 2023 (Wed) | The Prophet's Birthday | Muslim |
| 27 Sep, 2023 (Wed) | World Tourism Day | United Nations observance |
| 28 Sep, 2023 (Thu) | World Maritime Day | United Nations observance |
| 28 Sep, 2023 (Thu) | International Day for Universal Access to Information | United Nations observance |
| 28 Sep, 2023 (Thu) | World Rabies Day | Worldwide observance |
| 29 Sep, 2023 (Fri) | International Day of Awareness of Food Loss and Waste | United Nations observance |
| 29 Sep, 2023 (Fri) | World Heart Day | Worldwide observance |
| 29 Sep, 2023 (Fri) | American Indian Heritage Day | State Observance |
| 30 Sep, 2023 (Sat) | First Day of Sukkot | Jewish holiday |
| 30 Sep, 2023 (Sat) | International Translation Day | United Nations observance |
| 1 Oct, 2023 (Sun) | International Day of Older Persons | United Nations observance |
| 1 Oct, 2023 (Sun) | World Vegetarian Day | Worldwide observance |
| 2 Oct, 2023 (Mon) | World Habitat Day | United Nations observance |
| 2 Oct, 2023 (Mon) | International Day of Non-Violence | United Nations observance |
| 2 Oct, 2023 (Mon) | Frances Xavier Cabrini Day | State Holiday |
| 2 Oct, 2023 (Mon) | Child Health Day | Observance |
| 4 Oct, 2023 (Wed) | Feast of St Francis of Assisi | Christian |
| 5 Oct, 2023 (Thu) | World Teachers' Day | United Nations observance |
| 6 Oct, 2023 (Fri) | Last Day of Sukkot | Jewish holiday |
| 6 Oct, 2023 (Fri) | World Cerebral Palsy Day | Worldwide observance |
| 6 Oct, 2023 (Fri) | German American Day | Observance |
| 7 Oct, 2023 (Sat) | Shmini Atzeret | Jewish holiday |
| 8 Oct, 2023 (Sun) | Simchat Torah | Jewish holiday |
| 8 Oct, 2023 (Sun) | Chicago Marathon (Tentative Date) | Sporting event |
| 9 Oct, 2023 (Mon) | World Post Day | United Nations observance |
| 9 Oct, 2023 (Mon) | Leif Erikson Day | Observance |
| 9 Oct, 2023 (Mon) | Leif Erikson Day | Local observance |
| 9 Oct, 2023 (Mon) | Columbus Day | State Legal Holiday |
| 9 Oct, 2023 (Mon) | Columbus Day | Federal Holiday |
| 9 Oct, 2023 (Mon) | Columbus Day | State Holiday |
| 9 Oct, 2023 (Mon) | Fraternal Day | State Holiday |
| 9 Oct, 2023 (Mon) | Yorktown Victory Day | State Holiday |
| 9 Oct, 2023 (Mon) | Discoverers’ Day | State Observance |
| 9 Oct, 2023 (Mon) | Native American Day | State Observance |
| 9 Oct, 2023 (Mon) | Native American Day | State Holiday |
| 9 Oct, 2023 (Mon) | Indigenous People's Day | State Observance |
| 9 Oct, 2023 (Mon) | Indigenous People's Day (Tentative Date) | State Observance |
| 9 Oct, 2023 (Mon) | Indigenous People's Day | State Holiday |
| 9 Oct, 2023 (Mon) | American Indian Heritage Day | State Holiday |
| 10 Oct, 2023 (Tue) | World Mental Health Day | United Nations observance |
| 11 Oct, 2023 (Wed) | International Day for Natural Disaster Reduction | United Nations observance |
| 11 Oct, 2023 (Wed) | International Day of the Girl Child | United Nations observance |
| 11 Oct, 2023 (Wed) | Casimir Pulaski Day | State Observance |
| 12 Oct, 2023 (Thu) | World Spanish Language Day | United Nations observance |
| 12 Oct, 2023 (Thu) | World Sight Day | Worldwide observance |
| 13 Oct, 2023 (Fri) | Friday the 13th | Worldwide observance |
| 13 Oct, 2023 (Fri) | Navy Birthday | Observance |
| 14 Oct, 2023 (Sat) | Robert E. Lee's Birthday | State Observance |
| 15 Oct, 2023 (Sun) | Navratri | Hindu Holiday |
| 15 Oct, 2023 (Sun) | International Day of Rural Women | United Nations observance |
| 15 Oct, 2023 (Sun) | White Cane Safety Day | Observance |
| 16 Oct, 2023 (Mon) | World Food Day | United Nations observance |
| 16 Oct, 2023 (Mon) | Boss's Day | Observance |
| 17 Oct, 2023 (Tue) | International Day for the Eradication of Poverty | United Nations observance |
| 18 Oct, 2023 (Wed) | Alaska Day | State Holiday |
| 21 Oct, 2023 (Sat) | Sweetest Day | Observance |
| 23 Oct, 2023 (Mon) | Dussehra | Hindu Holiday |
| 24 Oct, 2023 (Tue) | United Nations Day | United Nations observance |
| 24 Oct, 2023 (Tue) | World Development Information Day | United Nations observance |
| 27 Oct, 2023 (Fri) | World Day for Audiovisual Heritage | United Nations observance |
| 27 Oct, 2023 (Fri) | Nevada Day | State Holiday |
| 29 Oct, 2023 (Sun) | World Stroke Day | Worldwide observance |
| 31 Oct, 2023 (Tue) | World Cities Day | United Nations observance |
| 31 Oct, 2023 (Tue) | Halloween | Observance |
| 1 Nov, 2023 (Wed) | All Saints' Day | Christian |
| 1 Nov, 2023 (Wed) | World Vegan Day | Worldwide observance |
| 1 Nov, 2023 (Wed) | First Day of Native American Heritage Month | Annual Monthly Observance |
| 2 Nov, 2023 (Thu) | All Souls' Day | Christian |
| 2 Nov, 2023 (Thu) | International Day to End Impunity for Crimes against Journalists | United Nations observance |
| 5 Nov, 2023 (Sun) | World Tsunami Awareness Day | United Nations observance |
| 5 Nov, 2023 (Sun) | New York City Marathon | Sporting event |
| 5 Nov, 2023 (Sun) | Daylight Saving Time ends | Clock change/Daylight Saving Time |
| 6 Nov, 2023 (Mon) | International Day for Preventing the Exploitation of the Environment in War and Armed Conflict | United Nations observance |
| 7 Nov, 2023 (Tue) | Election Day | Observance |
| 7 Nov, 2023 (Tue) | Election Day | State Holiday |
| 10 Nov, 2023 (Fri) | World Science Day for Peace and Development | United Nations observance |
| 10 Nov, 2023 (Fri) | Marine Corps Birthday | Observance |
| 10 Nov, 2023 (Fri) | Veterans Day (substitute) | Federal Holiday |
| 10 Nov, 2023 (Fri) | Veterans Day (substitute) | State Holiday |
| 11 Nov, 2023 (Sat) | Veterans Day | Federal Holiday |
| 11 Nov, 2023 (Sat) | Veterans Day | State Holiday |
| 12 Nov, 2023 (Sun) | Diwali/Deepavali | Hindu Holiday |
| 12 Nov, 2023 (Sun) | World Pneumonia Day | Worldwide observance |
| 13 Nov, 2023 (Mon) | Barack Obama Day | Local observance |
| 13 Nov, 2023 (Mon) | Veterans' Day/Armistice Day (substitute) | State Holiday |
| 14 Nov, 2023 (Tue) | World Diabetes Day | United Nations observance |
| 16 Nov, 2023 (Thu) | International Day for Tolerance | United Nations observance |
| 16 Nov, 2023 (Thu) | World Philosophy Day | United Nations observance |
| 17 Nov, 2023 (Fri) | World Prematurity Day | Worldwide observance |
| 19 Nov, 2023 (Sun) | World Day of Remembrance for Road Traffic Victims | United Nations observance |
| 19 Nov, 2023 (Sun) | World Toilet Day | United Nations observance |
| 19 Nov, 2023 (Sun) | International Men's Day | Worldwide observance |
| 19 Nov, 2023 (Sun) | George Rogers Clark Day | State Observance |
| 20 Nov, 2023 (Mon) | Universal Children's Day | United Nations observance |
| 20 Nov, 2023 (Mon) | Africa Industrialization Day | United Nations observance |
| 20 Nov, 2023 (Mon) | Transgender Day of Remembrance | Worldwide observance |
| 21 Nov, 2023 (Tue) | World Television Day | United Nations observance |
| 23 Nov, 2023 (Thu) | Thanksgiving Day | Federal Holiday |
| 23 Nov, 2023 (Thu) | Thanksgiving Day | State Holiday |
| 24 Nov, 2023 (Fri) | State Holiday | State Holiday |
| 24 Nov, 2023 (Fri) | Presidents' Day | State Holiday |
| 24 Nov, 2023 (Fri) | Lincoln's Birthday/Lincoln's Day | State Holiday |
| 24 Nov, 2023 (Fri) | Day After Thanksgiving | State Holiday |
| 24 Nov, 2023 (Fri) | Black Friday | Observance |
| 24 Nov, 2023 (Fri) | American Indian Heritage Day | State Holiday |
| 24 Nov, 2023 (Fri) | Native American Heritage Day | Observance |
| 24 Nov, 2023 (Fri) | Native American Heritage Day | State Holiday |
| 25 Nov, 2023 (Sat) | International Day for the Elimination of Violence against Women | United Nations observance |
| 27 Nov, 2023 (Mon) | Cyber Monday | Observance |
| 28 Nov, 2023 (Tue) | Giving Tuesday | Observance |
| 29 Nov, 2023 (Wed) | International Day of Solidarity with the Palestinian People | United Nations observance |
| 29 Nov, 2023 (Wed) | Nellie Tayloe Ross's Birthday | State Observance |
| 30 Nov, 2023 (Thu) | Day of Remembrance for all Victims of Chemical Warfare | United Nations observance |
| 1 Dec, 2023 (Fri) | World AIDS Day | United Nations observance |
| 1 Dec, 2023 (Fri) | Rosa Parks Day | State Observance |
| 1 Dec, 2023 (Fri) | Rosa Parks Day | Local observance |
| 2 Dec, 2023 (Sat) | International Day for the Abolition of Slavery | United Nations observance |
| 3 Dec, 2023 (Sun) | First Sunday of Advent | Christian |
| 3 Dec, 2023 (Sun) | International Day of Persons with Disabilities | United Nations observance |
| 4 Dec, 2023 (Mon) | International Day of Banks | United Nations observance |
| 5 Dec, 2023 (Tue) | International Volunteer Day for Economic and Social Development | United Nations observance |
| 5 Dec, 2023 (Tue) | World Soil Day | United Nations observance |
| 6 Dec, 2023 (Wed) | St Nicholas Day | Observance |
| 7 Dec, 2023 (Thu) | International Civil Aviation Day | United Nations observance |
| 7 Dec, 2023 (Thu) | Pearl Harbor Remembrance Day | State Observance |
| 7 Dec, 2023 (Thu) | Pearl Harbor Remembrance Day | Observance |
| 7 Dec, 2023 (Thu) | Delaware Day | State Observance |
| 8 Dec, 2023 (Fri) | Feast of the Immaculate Conception | Christian |
| 8 Dec, 2023 (Fri) | Chanukah/Hanukkah (first day) | Jewish holiday |
| 9 Dec, 2023 (Sat) | International Anti-Corruption Day | United Nations observance |
| 9 Dec, 2023 (Sat) | World Genocide Commemoration Day | United Nations observance |
| 10 Dec, 2023 (Sun) | Human Rights Day | United Nations observance |
| 10 Dec, 2023 (Sun) | Wyoming Day | State Observance |
| 11 Dec, 2023 (Mon) | International Mountain Day | United Nations observance |
| 12 Dec, 2023 (Tue) | International Day of Neutrality | United Nations observance |
| 12 Dec, 2023 (Tue) | International Universal Health Coverage Day | United Nations observance |
| 12 Dec, 2023 (Tue) | Feast of Our Lady of Guadalupe | Christian |
| 13 Dec, 2023 (Wed) | National Guard Birthday | Observance |
| 15 Dec, 2023 (Fri) | Last Day of Chanukah | Jewish holiday |
| 15 Dec, 2023 (Fri) | Bill of Rights Day | Observance |
| 17 Dec, 2023 (Sun) | Pan American Aviation Day | Observance |
| 17 Dec, 2023 (Sun) | Wright Brothers Day | Observance |
| 18 Dec, 2023 (Mon) | International Migrants Day | United Nations observance |
| 18 Dec, 2023 (Mon) | Arabic Language Day | United Nations observance |
| 20 Dec, 2023 (Wed) | International Human Solidarity Day | United Nations observance |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 22 Dec, 2023 (Fri) | Asarah B'Tevet | Jewish holiday |
| 24 Dec, 2023 (Sun) | Christmas Eve | State Holiday |
| 24 Dec, 2023 (Sun) | Christmas Eve | Observance, Christian |
| 25 Dec, 2023 (Mon) | Christmas Day | State Holiday |
| 25 Dec, 2023 (Mon) | Christmas Day | Federal Holiday |
| 25 Dec, 2023 (Mon) | Christmas Eve observed | State Holiday |
| 26 Dec, 2023 (Tue) | Kwanzaa (first day) | Observance |
| 26 Dec, 2023 (Tue) | Day After Christmas Day | State Holiday |
| 27 Dec, 2023 (Wed) | International Day of Epidemic Preparedness | United Nations observance |
| 31 Dec, 2023 (Sun) | New Year's Eve | Observance |
| 31 Dec, 2023 (Sun) | New Year's Eve | State Holiday |
