Thailand National Holidays Jan 01 New Year's Day Feb 26 Makha Bucha Day Apr 08 Chakri Day (Substitution Day) Apr 15 Songkran Day Apr 16 Songkran Day (Substitution Day) May 01 National Labour Day (Banks only) May 06 Substitute for Coronation Day May 09 Ploughing Ceremony (Government only) May 27 Substitute for Visakha Bucha Day Jul 01 Mid Year Closing Day (Bank only) Jul 24 Asarnga Bucha Day (Government only) Jul 25 Buddhist Lent Day Aug 12 H.M. the Queen's Birthday Oct 23 Chulalongkorn Memorial Day Dec 05 H.M. the King's Birthday Dec 10 Constitution Day Dec 31 New Year's Eve Source: Office of the Prime Minister Bank of Thailand