| 1 Jan, 2023 (Sun) | New Year's Day | National holiday |
| 1 Jan, 2023 (Sun) | January 1 Bank Holiday | Bank holiday |
| 2 Jan, 2023 (Mon) | Day off for New Year's Day | National holiday |
| 2 Jan, 2023 (Mon) | January 2 Bank Holiday | Bank holiday |
| 3 Jan, 2023 (Tue) | January 3 Bank Holiday | Bank holiday |
| 9 Jan, 2023 (Mon) | Coming of Age Day | National holiday |
| 3 Feb, 2023 (Fri) | Setsubun | Observance |
| 11 Feb, 2023 (Sat) | National Foundation Day | National holiday |
| 14 Feb, 2023 (Tue) | Valentine's Day | Observance |
| 23 Feb, 2023 (Thu) | Emperor's Birthday | National holiday |
| 3 Mar, 2023 (Fri) | Dolls' Festival/Girls' Festival | Observance |
| 21 Mar, 2023 (Tue) | Spring Equinox | National holiday |
| 21 Mar, 2023 (Tue) | March Equinox | Season |
| 29 Apr, 2023 (Sat) | Shōwa Day | National holiday |
| 3 May, 2023 (Wed) | Constitution Memorial Day | National holiday |
| 4 May, 2023 (Thu) | Greenery Day | National holiday |
| 5 May, 2023 (Fri) | Children's Day | National holiday |
| 14 May, 2023 (Sun) | Mother's Day | Observance |
| 22 Jun, 2023 (Thu) | June Solstice | Season |
| 7 Jul, 2023 (Fri) | Star Festival | Observance |
| 17 Jul, 2023 (Mon) | Sea Day | National holiday |
| 6 Aug, 2023 (Sun) | Hiroshima Memorial Day | Observance |
| 9 Aug, 2023 (Wed) | Nagasaki Memorial Day | Observance |
| 11 Aug, 2023 (Fri) | Mountain Day | National holiday |
| 18 Sep, 2023 (Mon) | Respect for the Aged Day | National holiday |
| 23 Sep, 2023 (Sat) | Autumn Equinox | National holiday |
| 23 Sep, 2023 (Sat) | September Equinox | Season |
| 9 Oct, 2023 (Mon) | Sports Day | National holiday |
| 3 Nov, 2023 (Fri) | Culture Day | National holiday |
| 15 Nov, 2023 (Wed) | 7-5-3 Day | Observance |
| 23 Nov, 2023 (Thu) | Labor Thanksgiving Day | National holiday |
| 22 Dec, 2023 (Fri) | December Solstice | Season |
| 25 Dec, 2023 (Mon) | Christmas | Observance |
| 31 Dec, 2023 (Sun) | December 31 Bank Holiday | Bank holiday |
