Today is Dodenherdenking, otherwise known as remembrance day. It’s the commemoration of all civilians and members of the armed forces of the Kingdom of the Netherlands who have died in wars or peacekeeping missions since the outbreak of World War II. (Source)
The main celebration is held in Amsterdam at Damplein, with a national two minutes of silence at 8 p.m. Radio, tv, and I gather even traffic halts at this moment. I will be in Amsterdam tonight, although I’ll be in the Melkweg waiting for the second Flight of the Conchords show. I’ll be curious if they do anything inside at that moment.
Tomorrow is a national holiday, Bevrijdingsdag (Liberation Day), celebrating the Dutch liberation from German occupation during WWII. There will be celebrations and music performances all over the country.
ETA: They did, in fact, observe the two minutes of silence at the Melkweg last night. They had a sign on the door announcing they would do so, and someone came out and announced it at the time.