St. Nicolas Day

There is a tradition in our school - every year, on 5th December, the under-graduates (aged 18/19) get dressed as St. Nicolas, devils and angels and they visit their younger schoolmates in their classrooms during the morning lessons (which the young students don´t mind as the teaching is interrupted for a few minutes and it´s fun) and give them nuts and sweets. Usually the kids don´t get the treats for free - they have to sing a song or say a poem first. 

You can read about this custom more here:

Saint Nicholas Day (Mikuláš)
The charming tradition of St. Nicholas falls on the eve of St. Nicholas Day, December 5th. If you find yourself walking the streets on that evening, you may run into a group of strange characters: St. Nicholas (Mikuláš), the Angel (anděl) who represents the Good, and the Devil (čert) representing the Evil. All wear costumes. Mikuláš looks a bit like Santa Claus whose origin was supposedly inspired by St. Nicholas. All three characters walk the streets, stopping children and asking them if they were good in the past year. Most kids say yes and sing a song or recite a short poem. They are then rewarded with sweets,  candy or other treats, which are handed out by the Angel. Bad kids would be put in the Devil's sack and taken to hell, or would only get a sack of potatoes or coal instead of candy - of course it does not really happen!

(text from www.myczechrepublic.com/czech_culture/czech_holidays/saint_nicholas.html)