Sunday 01 Jan New Year's Day
Friday 06 Apr Good Friday
Sunday 08 Apr Easter Sunday
Monday 09 Apr Easter Monday
Monday 30 Apr Queen's Day
Saturday 05 May Liberation Day
Thursday 17 May Ascension Day
Sunday 27 May Whit (Pentecost) Sunday
Monday 28 May Whit (Pentecost) Monday
Tuesday 25 Dec Christmas Day
Wednesday 26 Dec Boxing Day
Source: http://goamsterdam.about.com/od/planatrip/a/nationalholiday.htm