Queens Day is celebrated in Holland on April 30th. The national holiday is a chance for revellers to take part in "vrijmarkts", or free markets, play traditional Dutch games with their families, listen to music and get decked out in their best Saturday orange.
All I hear is another excuse to make cakes, have a gander at these:
Don't forget to keep checking Cupcake Decorating Ideas for more details ideas to help you with your own cupcakes.