Day Date Month Holiday Friday 01 Jan New Year's Day Monday 22 Feb Makha Bucha Wednesday 06 Apr Chakri Day Wednesday 13 Apr Songkran Thursday 14 Apr Songkran Friday 15 Apr Songkran Sunday 01 May Labor Day Thursday 05 May Coronation Day Friday 06 May Coronation Day Monday 09 May Royal Ploughing Ceremony Day Friday 20 May Visakha Bucha Monday 18 Jul Extra holiday Tuesday 19 Jul Asalha Bucha Wednesday 20 Jul Buddhist Lent Day Friday 12 Aug The Queen's Birthday Sunday 23 Oct Chulalongkorn Day Monday 24 Oct Chulalongkorn Day observed Monday 05 Dec The King's Birthday Saturday 10 Dec Constitution Day Monday 12 Dec Constitution Day observed Saturday 31 Dec New Year's Eve Source: Prime Minister's Office