Every year on May 4th, we commemorate the victims of war. In Amsterdam there is a big commemoration at Dam Square where prominent people (for example our King and Queen) lay wreaths at the National Monument. At 8pm everybody in the whole country is silent for two minutes.
May 5th is the day that the German army capitulated (in 1945) and is our National Liberation Day. There are many festivities in the whole country (14 Liberation Festivals). In Amsterdam Liberation Day is closed with a free open-air concert on the Amstel River. Various artists perform and there is a different orchestra every year. Members of our royal family attain the concert and, like many citizens do, they traditionally arrive by boat. You can watch the whole concert from the quay or standing on a bridge. The weather looks very promising this year so bring your bottle of wine and enjoy the music, the atmosphere and the beautiful view on the illuminated Amstel River. The concert starts at 9pm. More details: http://www.4en5mei.nl/herdenken-en-vieren/vieren/5-mei-concert/programma