Day Date Month Holiday Wednesday 1 Jan New Year's Day Monday 10 Feb Substitution for Makha Bucha Day (Saturday 8th Febuary 2020) Monday 6 Apr Chakri Memorial Day Monday 4 May Coronation Day Wednesday 6 May Wisakha Bucha Day Monday 11 May Royal Ploughing Ceremony Day Wednesday 3 Jun H.M. Queen Suthida?s Birthday Monday 6 Jul Substitution for Asarnha Bucha Day (Saturday 4th July 2020) Tuesday 7 Jul Substitution for Buddhist Lent Day (Sunday 5th July 2020) Monday 27 Jul Substitution for Songkran Festival Tuesday 28 Jul H.M. the King's Birthday Wednesday 12 Aug H.M. Queen Sirikit?s Birthday Friday 4 Sep Substitution for Songkran Festival Monday 7 Sep Substitution for Songkran Festival Tuesday 13 Oct The Passing of H.M. King Bhumibol Adulyadej Friday 23 Oct Chulalongkorn Day Thursday 19 Nov Special Holiday Friday 20 Nov Special Holiday Monday 7 Dec Substitution for H.M. the King Bhumibol Adulyadej's Birthday,
National Day and National Father's Day (Saturday 5th December 2020)
Thursday 10 Dec Constitution Day Friday 11 Dec Special Holiday Thursday 31 Dec New Year's Eve Remark: Subject to Change According to the Cabinet.