Week 13, 2026
March 23–29, 2026
Monday March 23 – Sunday March 292026-W13Days 82–88
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Mar 23 | 2026-W13-1 | 082 | 13 | 4 Shawwal 1447 AH | |
| Tue, Mar 24 | 2026-W13-2 | 083 | 13 | 5 Shawwal 1447 AH | |
| Wed, Mar 25 | 2026-W13-3 | 084 | 13 | 6 Shawwal 1447 AH | |
| Thu, Mar 26 | 2026-W13-4 | 085 | 13 | 7 Shawwal 1447 AH | |
| Fri, Mar 27 | 2026-W13-5 | 086 | 13 | 8 Shawwal 1447 AH | |
| Sat, Mar 28 | 2026-W13-6 | 087 | 13 | 9 Shawwal 1447 AH | |
| Sun, Mar 29 | 2026-W13-7 | 088 | 14 | 10 Shawwal 1447 AH | Palm Sunday |
About week 13
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 13 and Sunday US week 14.
None of the 17 national holiday sets we cover has a public holiday in this week; regional holidays are on the country pages. On Sun, Mar 29 clocks in the United Kingdom and Ireland go forward one hour at 1:00 a.m. On Sun, Mar 29 clocks in the European Union (Central European Time) go forward one hour at 2:00 a.m. Also this week: Palm Sunday on Sun, Mar 29 (the Sunday before Easter). All weeks of 2026 lists the neighbouring weeks.
Week 13 in other years
| Year | Week 13 runs |
|---|---|
| 2024 | Mon, Mar 25 – Sun, Mar 31 |
| 2025 | Mon, Mar 24 – Sun, Mar 30 |
| 2026 | Mon, Mar 23 – Sun, Mar 29 |
| 2027 | Mon, Mar 29 – Sun, Apr 4 |
| 2028 | Mon, Mar 27 – Sun, Apr 2 |
| 2029 | Mon, Mar 26 – Sun, Apr 1 |
In 2027, week 13 runs Mon, Mar 29 – Sun, Apr 4: 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 13 falls between March 22 and March 29.
By the end of week 13, 88 days of 2026 have passed (24.1% of the year), and 40 ISO weeks of 2026 remain. The week falls in Q1.
Writing week 13
ISO 8601 writes this week as 2026-W13 (basic format 2026W13), from 2026-W13-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.