Week 49 of 2025 runs December 1, 2025 to December 7, 2025.
Week 49 starts on Monday, December 1, 2025 and ends on Sunday, December 7, 2025. It's the 335th day of the year, sits in Q4, and falls in December. By the end of this week, 341 of 365 days are gone, putting 2025 at 93.4%.
There are no public holidays this week, so all 5 weekdays are working days. Need a different week? Browse the full 2025 week calendar, or jump to this week's number.
Week 49 at a glance
The 7 days of week 49
Every date in week 49 of 2025, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 335 | Weekday | ||
| Tuesday | Day 336 | Weekday | ||
| Wednesday | Day 337 | Weekday | ||
| Thursday | Day 338 | Weekday | ||
| Friday | Day 339 | Weekday | ||
| Saturday | Day 340 | Weekend | ||
| Sunday | Day 341 | Weekend |
What week 49 of 2025 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 49 is one piece of that system.
In 2025, week 49 covers Dec 1 – Dec 7, 2025. That's December, deep in Q4. The same week number shifts by a day or two each year, so week 49 in 2026 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 49 of 2025
🇺🇸 United States
Week 49 across years
The same ISO week number lands on different dates each year. Here's how week 49 shifts.
Week 49 of 2025: questions and answers
What days are in week 49 of 2025?
Week 49 of 2025 runs from December 1, 2025 (Monday) through December 7, 2025 (Sunday). It spans December.
What month is week 49 in 2025?
Week 49 of 2025 falls entirely in December 2025.
How many working days are in week 49 of 2025?
Week 49 of 2025 has 5 working days.
What quarter is week 49 of 2025 in?
Week 49 of 2025 is in Q4 (2025). The week starts on day 335 of 365.
What is ISO week 49?
ISO week 49 is defined by the ISO 8601 international standard. It begins on Monday, December 1, 2025, and ends on Sunday, December 7, 2025. It is week 94% through the ISO year 2025.