Constitution Day is a public holiday in Thailand, known locally as วันรัฐธรรมนูญ.
In 2026 it falls on Thursday 10 December; in 2027 on Friday 10 December.
The date is fixed, so only the weekday changes from year to year.
33 other countries in our calendar also have Constitution Day as a public holiday.
Dates, 2025 to 2028
| Year | Date | Weekday | Note |
|---|---|---|---|
| 2025 | 10 December | Wednesday | |
| 2026 | 10 December | Thursday | |
| 2027 | 10 December | Friday long weekend | |
| 2028 | 10 December | Sunday weekend |
Constitution Day elsewhere
Around the worldAndorra14 MarchAnguilla7 AugustArmenia5 JulyCambodia24 SeptemberCayman Islands6 JulyCook Islands4 AugustDominican Republic9 NovemberEquatorial Guinea15 AugustGhana7 JanuaryJapan3 MayKazakhstan—Kosovo9 AprilKyrgyzstan5 MayMarshall Islands1 MayMexico2 FebruaryNauru17 MayNepal19 SeptemberNiue19 OctoberNorthern Mariana Islands8 DecemberNorway17 MayPalau9 JulySeychelles18 JuneSint Maarten12 OctoberSouth Korea17 JulySpain—Svalbard and Jan Mayen17 MayTaiwan25 DecemberTajikistan6 NovemberTonga2 NovemberTurks and Caicos Islands31 AugustUruguay18 JulyUzbekistan8 DecemberVanuatu5 October