On November 25th, Estonia celebrates Kadripäev, also known as St. Catherine's Day. This traditional holiday is named after St. Catherine, the patron saint of young women, and it holds a special place in Estonian folklore and culture.

One of the main customs of Kadripäev is for young women, especially those named Kati or Katrin, to dress in traditional clothing and go door-to-door in their villages. They sing songs, recite poems, and offer good wishes to the households they visit. In return, they receive treats, sweets, or small gifts, similar to Halloween in some other countries where children go trick-or-treating.

Kadripäev is also associated with various folk beliefs and rituals, including divination games to predict the future. It's a time when Estonians come together to embrace their cultural heritage, enjoy festive foods, and partake in the merriment of the holiday season as winter approaches.