Home Calendars 2025 December December 2025 calendar
December 2025 starts on a Monday and has 23 weekdays, 21 of them working days in England and Wales. Christmas Day is on Thursday 25 December, and Boxing Day is on Friday 26 December.
Wk = ISO week number
December 2025 Wk Mo Tu We Th Fr Sa Su 49 1 2 3 4 5 6 7 50 8 9 10 11 12 13 14 51 15 16 17 18 19 20 21 52 22 23 24 25 26 27 28 1 29 30 31
25 Christmas Day26 Boxing Day
Key dates in December 2025
Date Occasion
Mon 1 Dec St Andrew's Day substitute day (bank holiday in Scotland) Sun 21 Dec Winter solstice , the shortest dayWed 24 Dec Christmas Eve Thu 25 Dec Christmas Day (bank holiday in the whole UK)Fri 26 Dec Boxing Day (bank holiday in the whole UK) Wed 31 Dec New Year's Eve
Schools usually break up for Christmas in the week before Christmas Day; dates are set locally. See school term dates .
December 2025 in numbers
31 days, from Monday 1 December 2025 to Wednesday 31 December 2025: days 335 to 365 of the year.
23 weekdays and 8 weekend days.
21 working days in England and Wales (2 bank holidays on weekdays), 20 in Scotland and 21 in Northern Ireland.
ISO weeks 49 to 1 (of 2026), from Monday 1 December 2025 to Sunday 4 January 2026.
Quarter 4 of 2025.
See the full 2025 calendar , or go to November 2025 or January 2026 . Also see the UK bank holidays list and today's week number .
Frequently asked questions
How many working days are in December 2025? December 2025 has 23 weekdays. Christmas Day and Boxing Day are bank holidays in England and Wales, leaving 21 working days.
What week numbers are in December 2025? December 2025 covers ISO weeks 49 to 1 (of 2026). Week 49 starts on Monday 1 December 2025 and week 1 ends on Sunday 4 January 2026.