mildlyannoyedrabbit:

National Sleepy Head Day (Finnish: unikeonpäivä) is celebrated in Finland on July 27.

Traditionally on this day, the last person in the house (also dubbed as the ‘laziest’) to wake up is woken up using water, either by being thrown into a lake or the sea, or by having water thrown on them. 

It is based on the story of the Saints of Ephesus who slept in a cave for 200 years during the Middle Ages while hiding from persecution by Decius, the Roman Emperor at the time.