| 1 Jan, 2023 (Sun) | New Year's Day | National holiday |
| 2 Jan, 2023 (Mon) | Day off for New Year's Day | National holiday |
| 14 Jan, 2023 (Sat) | National Children's Day | Observance |
| 16 Jan, 2023 (Mon) | Teachers' Day | Observance |
| 22 Jan, 2023 (Sun) | Lunar New Year's Day | Observance |
| 23 Jan, 2023 (Mon) | Second Day of Lunar New Year | Observance |
| 24 Jan, 2023 (Tue) | Third Day of Lunar New Year | Observance |
| 14 Feb, 2023 (Tue) | Valentine's Day | Observance |
| 6 Mar, 2023 (Mon) | Makha Bucha | National holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 6 Apr, 2023 (Thu) | Chakri Day | National holiday |
| 13 Apr, 2023 (Thu) | Songkran | National holiday |
| 14 Apr, 2023 (Fri) | Songkran | National holiday |
| 1 May, 2023 (Mon) | Labor Day | Bank holiday |
| 4 May, 2023 (Thu) | Coronation Day | National holiday |
| 5 May, 2023 (Fri) | Bridge Public Holiday | National holiday |
| 17 May, 2023 (Wed) | Royal Ploughing Ceremony Day | Government Holiday |
| 3 Jun, 2023 (Sat) | Visakha Bucha | National holiday |
| 3 Jun, 2023 (Sat) | Queen Suthida's Birthday | National holiday |
| 5 Jun, 2023 (Mon) | Day off for Visakha Bucha | National holiday |
| 5 Jun, 2023 (Mon) | Day off for Queen Suthida's Birthday | National holiday |
| 22 Jun, 2023 (Thu) | June Solstice | Season |
| 28 Jul, 2023 (Fri) | King Vajiralongkorn's Birthday | National holiday |
| 31 Jul, 2023 (Mon) | Bridge Public Holiday | National holiday |
| 1 Aug, 2023 (Tue) | Buddhist Lent Day | National holiday |
| 12 Aug, 2023 (Sat) | The Queen's Birthday | National holiday |
| 14 Aug, 2023 (Mon) | Day off for The Queen's Birthday | National holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 13 Oct, 2023 (Fri) | Anniversary of the Death of King Bhumibol | National holiday |
| 23 Oct, 2023 (Mon) | Chulalongkorn Day | National holiday |
| 31 Oct, 2023 (Tue) | Halloween | Observance |
| 5 Dec, 2023 (Tue) | King Bhumibol's Birthday/Father's Day | National holiday |
| 10 Dec, 2023 (Sun) | Constitution Day | National holiday |
| 11 Dec, 2023 (Mon) | Substitute Holiday for Constitution Day | National holiday |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 24 Dec, 2023 (Sun) | Christmas Eve | Observance |
| 25 Dec, 2023 (Mon) | Christmas Day | Observance |
| 31 Dec, 2023 (Sun) | New Year's Eve | National holiday |
