December 2025 CalendarDecember 2025

About December 2025

December's name comes from the Latin 'decem' ('ten'); it closed out the original ten-month Roman year, with the following weeks of deep winter left entirely unnamed until Numa Pompilius's later reform. The Northern Hemisphere's winter solstice, the shortest day of the year, falls around December 21-22; the Southern Hemisphere marks its summer solstice, the longest day, on the same date. The zodiac spans Sagittarius (until around the 21st) and Capricorn (from the 22nd), with turquoise, zircon, and tanzanite as traditional birthstones and the narcissus and holly as birth flowers.

US retailers generate a substantial share of their annual revenue during December's holiday shopping season, concentrated in the weeks between Thanksgiving and Christmas that retailers plan their entire year's inventory around.

Retailers in the US and much of the world generate a disproportionate share of their annual revenue in December, concentrated in the weeks surrounding Christmas.

December 2025: 23 weekdays, 8 weekend days.

December 2025: first day Monday, last day Wednesday — December runs 31 days total.

In December, the 13th lands on Saturday this 2025.

December 2025 contains 4 complete Saturday-to-Sunday weekends.

December 2025: first Monday 1st, first Sunday 7th.

December 2025: third Friday is the 19th.

2025, December: day 335 to 365 of 2025 (Q4).

December 2025: the last month, zero days left once 2025 closes out.

December 2025: 4 holidays tracked.

Holidays in December 2025

• Christmas Eve — Wednesday, December 24
• Christmas — Thursday, December 25
• Boxing Day — Friday, December 26
• New Year's Eve — Wednesday, December 31

Nearby calendars

Browse every month on the Calendar index, or find days-in-month and week-number math with the Days in a Month and Week Number Calculator tools.