Week 50, 2027
December 13–19, 2027
Monday December 13 – Sunday December 192027-W50Days 347–353
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Dec 13 | 2027-W50-1 | 347 | 51 | 15 Rajab 1449 AH | |
| Tue, Dec 14 | 2027-W50-2 | 348 | 51 | 16 Rajab 1449 AH | |
| Wed, Dec 15 | 2027-W50-3 | 349 | 51 | 17 Rajab 1449 AH | |
| Thu, Dec 16 | 2027-W50-4 | 350 | 51 | 18 Rajab 1449 AH | Day of Reconciliation (South Africa) |
| Fri, Dec 17 | 2027-W50-5 | 351 | 51 | 19 Rajab 1449 AH | |
| Sat, Dec 18 | 2027-W50-6 | 352 | 51 | 20 Rajab 1449 AH | |
| Sun, Dec 19 | 2027-W50-7 | 353 | 52 | 21 Rajab 1449 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 51 and Sunday US week 52.
Holidays this week: Day of Reconciliation on Thu, Dec 16 in South Africa. All weeks of 2027 lists the neighbouring weeks.
Week 50 in other years
| Year | Week 50 runs |
|---|---|
| 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 |
| 2030 | Mon, Dec 9 – Sun, Dec 15 |
In 2028, week 50 runs Mon, Dec 11 – Sun, Dec 17: 364 days later, 2 days earlier 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, 353 days of 2027 have passed (96.7% of the year), and 2 ISO weeks of 2027 remain. The week falls in Q4.
Writing week 50
ISO 8601 writes this week as 2027-W50 (basic format 2027W50), from 2027-W50-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.