Day Date Month Holiday Monday 1 Jan New Year's Day Tuesday 2 Jan Substitution for New Year's Eve (Sunday 31st December 2017) Thursday 1 Mar Makha Bucha Day Friday 6 Apr Chakri Memorial Day Friday 13 Apr Songkran Festival Monday 16 Apr Songkran Festival Thursday 10 May Royal Ploughing Ceremony Day Tuesday 29 May Wisakha Bucha Day Friday 27 Jul Asarnha Bucha Day Monday 30 Jul Substitution for H.M. the King's Birthday (Saturday 28th July 2018) Monday 13 Aug Substitution for H.M. Queen Sirikit’s Birthday (Sunday 12th August 2018) Monday 15 Oct Substitution for the Passing of H.M. King Bhumibol Adulyadej (Saturday 13th October 2018) Tuesday 23 Oct Chulalongkorn Day Wednesday 5 Dec H.M. the King Bhumibol Adulyadej's Birthday,
National Day and National Father's Day
Monday 10 Dec Constitution Day Monday 31 Dec New Year's Eve Remark: Subject to Change According to the Cabinet.