Today is mihklipäev (Michaelmas), one of the important days in Estonian Folk Calendar.
Mihklipäev marked the end of summer, the summer work should have been finished by then. A sheep was slaughtered on mihklipäev and it's meat prepared for a harvest feast. They also brewed beer and cooked lots of food for the feast. Besides celebrating the harvest feast and the end of summer work they also celebrated the end of summer worker's contracts. People went to Michaelmas Fairs and to pubs.
The village social life picked up speed after the Michaelmas and the high season of weddings begun.
Excerpt translated from Estonian Vikipeedia.