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People celebrate Queen's Day at Prinsengracht in Amsterdam, Netherlands, Monday, April 30, 2012, a Dutch national holiday marking the birthday of the Queen's mother. (AP Photo/Margriet Faber)

Queen's Day in Netherlands

A large chunk of the Dutch population was clad in orange April 30 for Queen's Day, the Dutch national holiday, which honors the ruling House of Orange. There were parties around the country, with the ruling Queen Beatrix attending celebrations in the cities of Rhenen and Veenendaal.