In the old Finnish pagan wheel of the year, Mikonpäivä/Mikkelinpäivä the day of St.Michael was celebrated in 29th of September. In southern Savonia, this day was known as pässinpäivä the day of the ram.

Mikonpäivä started the winter season and was known as the gate to winter and the opposite of it was Hela the May festival which was a gate to the summer.