Jan. 01 New Year's Day Feb. 21 Makha Bucha Day Apr. 06 Chakri Memorial Day Apr. 13 Songkran Day May 01 Labour Day May 05 Coronation Day May 20 Wisakha Bucha Day Jul. 20 Buddhist Lent Day Aug. 12 H.M. the Queen's Birthday Oct. 23 Chulalongkorn Day Dec. 05 H.M. the King's Birthday Dec. 10 Constitution Day Dec. 31 New Year Eve