The first day of spring is not always on March 21, but usually within a few days of that date, falling on March 19, March 20 or March 21 — depending on when the vernal (or spring) equinox is.

When is winter solstice 2025? Winter solstice 2025, which marks the start of winter in the Northern Hemisphere, will occur on Sunday, Dec. 21, 2025, 10:03 a.m. Eastern.

Winter solstice 2025, which marks the start of winter in the Northern Hemisphere, will occur on Sunday, Dec. 21, 2025, 10:03 a.m. Eastern. When is the shortest day of the year?

Punxsutawney Phil saw his shadow on Groundhog Day, predicting six more weeks of winter this year. However, the National Oceanic and Atmospheric Administration says the groundhog is far from accurate.

The first day of spring is not always on March 21, but usually within a few days of that date, falling on March 19, March 20 or March 21 — depending on when the vernal (or spring) equinox is.

The first day of spring is not always on March 21, but usually within a few days of that date, falling on March 19, March 20 or March 21 — depending on when the vernal (or spring) equinox is.