Week 52 of 2026: Dates
Week 52 of 2026 starts on Monday, December 21, 2026 and ends on Sunday, December 27, 2026. It falls in December, in the fourth quarter of 2026.
The days of week 52, 2026
| Day | Date | Day of year | US federal holiday |
|---|---|---|---|
| Monday | December 21, 2026 | Day 355 | |
| Tuesday | December 22, 2026 | Day 356 | |
| Wednesday | December 23, 2026 | Day 357 | |
| Thursday | December 24, 2026 | Day 358 | |
| Friday | December 25, 2026 | Day 359 | Christmas Day |
| Saturday | December 26, 2026 | Day 360 | |
| Sunday | December 27, 2026 | Day 361 |
Other days in this week: Winter, Christmas Eve, Christmas, Boxing Day, Kwanzaa, Quaid-e-Azam Day.
ISO and US week numbers
Week 52 covers days 355 to 361 of 2026. US calendars start the week a day earlier, on Sunday, December 20. On that count the same Monday is in week 52 of 2026, so here the two numbers match. To check it in Excel or Google Sheets, =ISOWEEKNUM(DATE(2026,12,21)) returns 52 and =WEEKNUM(DATE(2026,12,21)) returns 52.
Week 52 by year
| Year | Monday | Sunday |
|---|---|---|
| 2026 | December 21, 2026 | December 27, 2026 |
| 2027 | December 27, 2027 | January 2, 2028 |
| 2028 | December 25, 2028 | December 31, 2028 |
| 2029 | December 24, 2029 | December 30, 2029 |
| 2030 | December 23, 2030 | December 29, 2030 |
| 2031 | December 22, 2031 | December 28, 2031 |
This page shows the next week 52 that has not ended yet. ISO weeks start on Monday, and week 1 contains the year's first Thursday.
Week 52 questions
When does week 52 of 2026 start?
On Monday, December 21, 2026. It ends on Sunday, December 27, 2026, seven days later.
Does every year have a week 52?
Yes. Every ISO year has weeks 1 to 52, and only some have a week 53.
Related pages
Cite this page
APA: ClockTotals. (2026, October 27). Week 52 of 2026: Dates. https://clocktotals.com/week-number/52/
MLA: “Week 52 of 2026: Dates.” ClockTotals, 27 Oct. 2026, clocktotals.com/week-number/52/.
Link (HTML): <a href="https://clocktotals.com/week-number/52/">Week 52 of 2026: Dates</a>