| 1 Jan, 2023 (Sun) | Republic Day | National holiday |
| 6 Jan, 2023 (Fri) | Epiphany | National holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 25 Mar, 2023 (Sat) | Struggle for Human Rights Day | Observance |
| 7 Apr, 2023 (Fri) | Good Friday | National holiday |
| 9 Apr, 2023 (Sun) | Easter Sunday | Observance, Christian |
| 10 Apr, 2023 (Mon) | Easter Monday | National holiday |
| 13 Apr, 2023 (Thu) | Unfairly Prosecuted Persons Day | Observance |
| 1 May, 2023 (Mon) | Labor Day | National holiday |
| 1 May, 2023 (Mon) | Accession to the European Union Day | Observance |
| 4 May, 2023 (Thu) | Death Anniversary of M. R. Štefánik | Observance |
| 8 May, 2023 (Mon) | Day of Victory Over Fascism | National holiday |
| 14 May, 2023 (Sun) | Mothers' Day | Observance |
| 7 Jun, 2023 (Wed) | Anniversary of the Memorandum of the Slovak Nation | Observance |
| 18 Jun, 2023 (Sun) | Fathers' Day | Observance |
| 21 Jun, 2023 (Wed) | Day of the Departure of the Soviet Army from Czechoslovakia | Observance |
| 21 Jun, 2023 (Wed) | June Solstice | Season |
| 24 Jun, 2023 (Sat) | Remembrance Day for the Victims of the Communist Regime | Observance |
| 5 Jul, 2023 (Wed) | St. Cyril & St. Methodius Day | National holiday |
| 5 Jul, 2023 (Wed) | Foreign Slovaks Day | Observance |
| 17 Jul, 2023 (Mon) | Anniversary of the Declaration of Sovereignty of the Slovak Republic | Observance |
| 4 Aug, 2023 (Fri) | Matice Slovenska Day | Observance |
| 10 Aug, 2023 (Thu) | Day of the Victims of Mining Disasters | Observance |
| 21 Aug, 2023 (Mon) | Day of the Victims of the Occupation of Czechoslovakia | Observance |
| 29 Aug, 2023 (Tue) | National Uprising Day | National holiday |
| 1 Sep, 2023 (Fri) | Constitution Day | National holiday |
| 9 Sep, 2023 (Sat) | Day of the Victims of Holocaust and of racial violence | Observance |
| 15 Sep, 2023 (Fri) | Day of Our Lady of Sorrows | National holiday |
| 19 Sep, 2023 (Tue) | Foundation of the Slovak National Council Day | Observance |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 6 Oct, 2023 (Fri) | Day of the Heroes of the Carpathian-Duklian Operation | Observance |
| 12 Oct, 2023 (Thu) | Samizdat Day | Observance |
| 27 Oct, 2023 (Fri) | Černová Tragedy Day | Observance |
| 28 Oct, 2023 (Sat) | Establishment of the Independent Czecho-Slovak State | Observance |
| 29 Oct, 2023 (Sun) | Birth of Ľudovíta Štúr | Observance |
| 30 Oct, 2023 (Mon) | Anniversary of the Declaration of the Slovak Nation | Observance |
| 31 Oct, 2023 (Tue) | Reformation Day | Observance |
| 1 Nov, 2023 (Wed) | All Saints' Day | National holiday |
| 17 Nov, 2023 (Fri) | Fight for Freedom and Democracy Day | National holiday |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 24 Dec, 2023 (Sun) | Christmas Eve | National holiday |
| 25 Dec, 2023 (Mon) | Christmas Day | National holiday |
| 26 Dec, 2023 (Tue) | St. Stephen's Day | National holiday |
| 30 Dec, 2023 (Sat) | Day of the Declaration of Slovakia as an Independent Ecclesiastic Province | Observance |
