A bit of history which I never heard of….
The Dutch celebrate the 1st of April for other reasons. In 1572, the Netherlands were ruled by Spain’s King Philip II. Roaming the region were Dutch rebels who called themselves Geuzen, after the French “gueux”, meaning beggars. On 1 April, 1572, the Geuzen seized the small coastal town of Den Briel.
This event was also the start of the general civil rising against the Spanish in other cities in the Netherlands. The Duke of Alba, commander of the Spanish army could not prevent the uprising. Bril is the Dutch word for glasses, so on 1 April, 1572, “Alba lost his glasses”. Dutch people find this joke so hilarious they still commemorate the first of April. ….
I probably was staring out of the window in school :)