December 2025
Plan with intention
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Made with Calendar Forge
Date guide
Sunday, December 21, 2025
Sunday, December 21, 2025 falls on a Sunday. It is day 355 of 365 and sits in ISO week 51.
Sunday21
December 2025
226 days ago (UTC)Day of year355 of 365
ISO week51
QuarterQ4
Days left in year10
Leap yearNo
ISO date2025-12-21
In context
December 2025 calendar
The selected date is highlighted. US national holidays are shown when they occur.
December 21 written four ways
- ISO 8601
- 2025-12-21
- US numeric
- 12/21/2025
- International
- 21/12/2025
- Long form
- Sunday, December 21, 2025
No national holiday listed
Calendar Forge does not list a US or Canadian national holiday on this date. Regional holidays and informal observances may still apply.
Printable daily planner
Sunday · Week 51Plan Dec 21, 2025
Schedule
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