ObservanceThursday, December 10, 2026
Dewey Decimal System Day
- Date
- Recurs
- Every year on December 10
- Category
- Books
Dewey Decimal System Day is a reading- and writing-focused observance on December 10, celebrated by book lovers across the United States.
Add to your calendarA calendar file for Apple Calendar, Google Calendar or Outlook. The event repeats every year. You can also subscribe to this observance or to the whole calendar.
← See everything December 10 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.