On December 18, the Orthodox Church remembers Saint Savva the Sanctified.
In the folk calendar, December 18 is Savva's Day, Savva Winter, Savva Salnik, Savva with lard, Savva with a nail.
According to folk signs, on this day you can find out whether the winter will be warm.
If there is a strong frost on Savvin's day, the winter will be warm and snowy.
If bullfinches start singing on Savva Zimny, a snowstorm is expected.
If squirrels come down from the trees, there will be a thaw.
A red sky at sunset on this day foretells a cold snap.