According to the folk calendar - Alexander Sytnik

On this date, Orthodox Christians pay tribute to the memory of Prince Alexander Nevsky - the defender of the Russian land, St. Alexander, Reverend Alexander of Svir. Popularly, September 12 is also called Sytnik or Svytnik, since it was on this day that, after strict fasting that fell on the previous day, it was customary to set a generous table - prepare hearty porridges and freshly baked bread from the collected and ground grain harvest.