Monday 02 Jan Substitution New Year's Day
Tuesday 03 Jan Substitution New Year's Day
Wednesday 07 Mar Makha Bucha Day
Friday 06 Apr Chakri Day
Monday 09 Apr Special Holiday
Friday 13 Apr Songkran Festival
Monday 16 Apr Substitution for Songkran Festival
Tuesday 01 May National Labour Day
Monday 07 May Substitution for Coronation Day
Monday 04 Jun Wisakha Bucha Day
Thursday 02 Aug Asarnha Bucha Day
Monday 13 Aug Substitution for H.M. The Queen's Birthday
Tuesday 23 Oct Chulalongkorn Day
Wednesday 05 Dec H.M. the King's Birthday
Monday 10 Dec Constitution Day
Monday 31 Dec New Year's Eve
Source: http://www.set.or.th/en/about/holidays/holidays_12.html