Week 50, 2026
December 7–13, 2026
Monday December 7 – Sunday December 132026-W50Days 341–347
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Dec 7 | 2026-W50-1 | 341 | 50 | 27 Jumada al-Akhirah 1448 AH | |
| Tue, Dec 8 | 2026-W50-2 | 342 | 50 | 28 Jumada al-Akhirah 1448 AH | Immaculate Conception (Spain) |
| Wed, Dec 9 | 2026-W50-3 | 343 | 50 | 29 Jumada al-Akhirah 1448 AH | |
| Thu, Dec 10 | 2026-W50-4 | 344 | 50 | 1 Rajab 1448 AH | |
| Fri, Dec 11 | 2026-W50-5 | 345 | 50 | 2 Rajab 1448 AH | |
| Sat, Dec 12 | 2026-W50-6 | 346 | 50 | 3 Rajab 1448 AH | |
| Sun, Dec 13 | 2026-W50-7 | 347 | 51 | 4 Rajab 1448 AH |
About week 50
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 50 and Sunday US week 51.
Holidays this week: Immaculate Conception on Tue, Dec 8 in Spain. 1 Rajab 1448 AH falls on Thu, Dec 10 by the Umm al-Qura calendar (computed). All weeks of 2026 lists the neighbouring weeks.
Week 50 in other years
| Year | Week 50 runs |
|---|---|
| 2024 | Mon, Dec 9 – Sun, Dec 15 |
| 2025 | Mon, Dec 8 – Sun, Dec 14 |
| 2026 | Mon, Dec 7 – Sun, Dec 13 |
| 2027 | Mon, Dec 13 – Sun, Dec 19 |
| 2028 | Mon, Dec 11 – Sun, Dec 17 |
| 2029 | Mon, Dec 10 – Sun, Dec 16 |
In 2027, week 50 runs Mon, Dec 13 – Sun, Dec 19: 2026 has 53 weeks, so the same number comes 371 days later, 6 days later in the calendar. Over the 400-year cycle, the Monday of week 50 falls between December 6 and December 13.
By the end of week 50, 347 days of 2026 have passed (95.1% of the year), and 3 ISO weeks of 2026 remain. The week falls in Q4.
Writing week 50
ISO 8601 writes this week as 2026-W50 (basic format 2026W50), from 2026-W50-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.