That reminds me, the main remembrance days here are 4 and 5 May. On 4 May, mainly in the evening, is the 'death remembrance', which started in 1945 to commemorate the people who have died in WW2, but now includes all Dutch victims of wars and armed conflicts ever since. The main thing of that day is at 20:00, when everyone is silent for two minutes (trains stop driving, radio stations stop their broadcasts, and so on). Generally this is filled to the brink with people attending the national ceremony, where the king and some others lay down some wreaths. Now of course it was empty, apart from the king, his wife and some others conducting the ceremony (but obviously while keeping the distance from each other, as is necessary).
Then on 5 May it's what could be translated to 'Liberation Day', a free day for many and generally a day with music festivals and such all over the country. That was of course cancelled now, so it wasn't much special apart from TV broadcasting specials and movies and stuff all day long.
This is the first time I've heard of 8 May being a thing, so that's interesting.