Ever since the end of World War II, the Netherlands remembers its dead on the 4 of May. This is what the official remembrance website says:
‘During the national commemoration of Remembrance Day we remember all those – civilians and soldiers – who have been killed or murdered in the Kingdom of the Netherlands or anywhere else in the world in war situations or during peace-keeping operations since the outbreak of the Second World War.’
As from 1961, the victims of the Second World War are remembered together with victims of other conflicts, wars and peace-keeping missions that have taken place since the outbreak of the Second World War in the Netherlands.
(source; www 4en5mei.nl)