Source-backedEdition Specific
Asalha Puja Day
Thailand.go.th lists an Asalha Puja Day event on 29 July 2026. Thailand’s Office of Buddhism explains that Asalha Puja follows the full moon of the eighth lunar month, so the Gregorian date…
Country observance hub
Thailand observances
11 source-backed records whose verified scope explicitly identifies Thailand. This is an observance index, not a public-holiday calendar.
All verified country-scope records
Thailand authority library
Source-backedVariable Custom
Chiang Mai Yee Peng Festival
Thailand’s government event portal gives 4–6 November for the 2025 Chiang Mai Yee Peng Festival. Because Yee Peng follows local/lunar festival scheduling, another year must use the current…
Source-backedFixed Annual
Constitution Day
Thailand’s Board of Investment official 2026 holiday information lists 10 December 2026 as Constitution Day.
Source-backedEdition Specific
Coronation Day of His Majesty King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua
Thailand Ministry of Foreign Affairs documents Coronation Day ceremonies for His Majesty the King on 4 May 2026
Source-backedEdition Specific
H.M. King Bhumibol Adulyadej the Great’s Birthday, National Day and Father’s Day
The Bank of Thailand lists 7 December 2026 as the substitution holiday for the 5 December 2026 birthday of King Bhumibol, National Day and Father’s Day.
Source-backedEdition Specific
H.M. King Maha Vajiralongkorn Phra Vajiraklaochaoyuhua’s Birthday
The Bank of Thailand’s 2026 holiday notification lists the King’s Birthday on 28 July 2026.
Source-backedEdition Specific
H.M. Queen Sirikit the Queen Mother’s Birthday and Mother’s Day
The Bank of Thailand’s 2026 holiday notification lists H.M. Queen Sirikit the Queen Mother’s Birthday and Mother’s Day on 12 August 2026.
Source-backedEdition Specific
H.M. Queen Suthida Bajrasudhabimalalakshana’s Birthday
The Bank of Thailand’s 2026 holiday notification lists H.M. Queen Suthida Bajrasudhabimalalakshana’s Birthday on 3 June 2026.
Source-backedFixed Annual
National Father’s Day
Thailand’s Government Public Relations Department states that 5 December, the birthday of the late King Bhumibol Adulyadej The Great, is also observed as Thailand’s National Day and Nationa…
Source-backedFixed Annual
National Mother’s Day
Thailand’s Cabinet confirmed in July 2026 that 12 August every year remains National Mother’s Day, alongside the Birthday Anniversary of Queen Sirikit The Queen Mother, and remains an annua…
Source-backedEdition Specific
Songkran Festival
The Thai Government identifies 13–15 April 2026 as the traditional Songkran holidays, while the Tourism Authority of Thailand describes broader 2026 festival programming including events ou…