According to the folk calendar - Thekla the Zapryadalnitsa

The holiday is associated with the name of the Christian first martyr Thekla of Iconium The day of October 7 was called Thekla Zapriadalnaya, since they worked with yarn on it There was a belief that the one who spins on this day will achieve great skill in this craft The peasants on Thekla pulled beets and went into the forest for the last harvest of boletus mushrooms