Belgium National Holidays
2 Jan Monday on the occasion of New Year's Day (substitution day)
17 Apr Monday on the occasion of Easter Monday
1 May Monday on the occasion of Labour Day
25 May Thursday on the occasion of Ascension Day
5 Jun Monday on the occasion of Whit Monday
21 Jul Thursday on the occasion of the National Day of Belgium
14 Aug Monday on the occasion of H.M. The Queen's Birthday (substitution day)
1 Nov Wednesday on the occasion of All Saint's Day
15 Nov Wednesday on the occasion of King's Day
25 Dec Monday on the occasion of Christmas Day
26 Dec Tuesday on the occasion of Boxing Day
Source: Embassy of Belgium in Bangkok