ObservanceMonday, December 21, 2026
First Day of Winter
- Date
- Recurs
- The date changes each year. This page always shows the next one.
- Category
- Nature
First Day of Winter is a nature-focused observance on December 21, celebrated across the United States to draw attention to the plant, animal, or landscape at its center.
Add to your calendarA calendar file for Apple Calendar, Google Calendar or Outlook. This date moves, so the file carries the next 10 dates. You can also subscribe to this observance or to the whole calendar.
← See everything December 21 celebratesKnow a holiday we're missing, or think this date has more going on? Today Celebrates tracks daily national, international, and world observances all year.