The date of the winter solstice varies from year to year and can fall anywhere from December 20 to 23, but the 21st and 22nd are the most common dates. For 2021 here in the East Coast, it falls on Tuesday, December 21, at 10:59 am EST.
Today Yule also marks the winter solstice although this is far from how it originated. It is the shortest day and longest night of the year - as the Sun gets its lowest elevation in the sky. Apart from the marking of a new season, the winter solstice also holds a significant symbol for the Sun.