On November 30, the Orthodox Church honors the memory of Saint Gregory the Wonderworker.
In the folk calendar, November 30 is Grigoriev Day, Grigory the Winter-Pointer, Meeting of the North, Pre-winter.
According to folk signs, on St. Gregory's Day you can find out what the winter will be like.
Weather signs for November 30
The weather on St. Gregory's Day is what the winter will be like.
Sunny weather on this day promises a warm and little snowy winter.
A frosty morning on Gregory the Winter-indicator means a severe cold snap.
Dark ice on the rivers foretells a fruitful year.
For reference
A sign is a stable connection between two phenomena of objective reality, one of which is understood as a sign, and the second as its interpretation, usually in the form of a forecast for the future; a linguistic (in the form of an aphorism, paremia) representation of this connection.