New Year's Day
Easter Monday
Labor Day
Ascension Day
Pentecost Monday
National Day
Assumption of Mary
All Saints' Day
Armistice Day
King's Day
Christmas Day
  January
  February
  March
  April
  May
  June
  July
  August
  September
  October
  November
  December
 ‹ 1230
1231
1232 › 
# Date Public holiday
1Wednesday, 1 January 1231 New Year's Day
2Monday, 31 March 1231 Easter Monday
3Thursday, 1 May 1231 Labor Day
4Thursday, 8 May 1231 Ascension Day/Iris Day
5Monday, 19 May 1231 Pentecost Monday
6Monday, 21 July 1231 National Day
7Friday, 15 August 1231 Assumption of Mary
8Saturday, 1 November 1231 All Saints' Day
9Tuesday, 11 November 1231 Armistice Day
10Saturday, 15 November 1231 King's Day
11Thursday, 25 December 1231 Christmas Day