© Madroon Community Consultants (MCC)
The Monarch's birthday has been celebrated at the end of April(*) since 1949, the year in which SRZM, the forerunner of ASTRON, was founded. It is deemed to mark the end of the miserably cold part of the Dutch spring, and thus the harbinger of better times.
(*) Since it is not always easy to ensure that the next monarch is born at the end of April, it has been suggested that we adopt the date of birth of the Father of the Dutch nation, William of Orange, on April 24th 1533.