Skip to content
DateAlmanac

December 2031

  • 31 days
  • Starts Monday
  • Ends Wednesday
  • 22 working days
  • 8 weekend days
  • ISO weeks 49–1
Calendar grid for 12/2031, weeks starting Sun
ISO week number, Monday to Sunday
49
50
51
52
1

Holiday or observanceWeekend

Holidays in December

  • Christmas EveDec 24
  • Christmas DayDec 25
  • New Year's EveDec 31

Federal holidays from 5 U.S.C. §6103, plus widely kept US observances. 3 religious dates fall in December 2031 as well — see the calendar with every holiday.

Moon phases

  • Last quarter

    Sat, Dec 6

    10:19 PM ET

  • New moon

    Sun, Dec 14

    4:05 AM ET

  • First quarter

    Sat, Dec 20

    7:00 PM ET

  • Full moon

    Sun, Dec 28

    12:32 PM ET

Times in US Eastern. Computed from Meeus, Astronomical Algorithms, ch. 49.

The moon through December

  1. 1
  2. 3
  3. 5
  4. 7
  5. 9
  6. 11
  7. 13
  8. 15
  9. 17
  10. 19
  11. 21
  12. 23
  13. 25
  14. 27
  15. 29
  16. 31
The moon every other evening, drawn at its true illumination. The terminator is a semi-ellipse, not a straight edge — it only looks straight at the quarters.

About December 2031

December 2031 has 31 days. It begins on a Monday and ends on a Wednesday, which gives the month five Mondays, Tuesdays and Wednesdays — and only four of every other weekday. Of its 23 weekdays, 1 is a federal holiday, leaving 22 working days.

The December solstice falls on Sunday, December 21, 2031, the 21st of the month.

2031 at a glance

Calendar with holidaysPrintable versionDownload PDFFull year 2031