Dates on the grid are guideposts. Ancient calendars, local seasons, and contemporary traditions differ; the linked sources explain what is attested and what is a modern choice.
Historical season · Midwinter season · dates vary
Midwinter / Jól (Yule)
Feasting and offerings at midwinter are attested in saga sources. Many present-day groups observe Jól around the winter solstice; others use a lunar midwinter date.
Ynglinga saga names a midwinter offering for a good crop. Its exact modern calendar date is not established by that passage.