November 10th is a day Martin’s Day! 

Martiņdiena is a celebrated day in Latvian annual customs that marks the end of autumn and the beginning of winter.

Mārtiņdiena is the mid-point between the autumn and winter festivals, and traditionally marked the deadline when the field work was finished and the long winter was ahead.

 Celebrating Mārtiņdiena was (and is!) important to help ensure luck and prosperity for the coming year.One important ancient ritual involved in celebrating Mārtiņdiena-the sacrifice of a rooster. This was believed to gain protection for livestock. The roosters were cooked and eaten by the family. Other traditions involved dressing in strange and grotesque costumes (a bear, a goat, a crane, a wolf, haystacks, and death were among the most popular forms) and going from farm to farm singing and playing jokes in exchange for treats from the householders – something with clear parallels to modern trick-or-treating at Halloween.

  As with most seasonal waypoints in the Latvian calendar, the weather on Mārtiņdiena is supposed to give a guide to the future. Here are a few examples:
 

• If it's freezing on St. Martin's Day, it will be warm around Christmas.
• If St. Martin's day is nice and clear, then there will be a big frost in the winter.
• If there is snow on the roofs on St. Martin's day, it will be a long winter.
• If there is frost on the trees on St. Martin's Day, there will be plenty of garden fruit.
• If St. Martin's day is foggy, then the winter will be warm.

When green leaves are still visible on the trees and bushes at St Martin's day, next year there will be few green leaves around Midsummer.

https://eng.lsm.lv/article/culture/history/cock-a-doodle-doo-its-martindiena.a481937/