Because of the upcoming festivities surrounding Sinterklaas and Christmas the shops in the city center have special opening hours to make sure you have plenty of time to do your holiday shopping. Outside of the regular shopping hours and the usual shopping night on Thursday and Shopping Sunday every first Sunday of the month, there are extra shopping nights on Wednesday the 4th and Monday the 23rd of December (the night before Sinterklaas and the night before Christmas eve) and every Sunday in December is Shopping Sunday.
On Thursday 5 December (Sinterklaas) and Tuesday 24 December (Christmas Eve) the shops close at 17:00 hours. On Wednesday 25 and Thursday 26 December (Christmas and Boxing Day) and on the first of January (New Years Day) all the shops are closed.
For more information about the regular opening hours go here.