Week 17, 2026
April 20–26, 2026
Monday April 20 – Sunday April 262026-W17Days 110–116
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Apr 20 | 2026-W17-1 | 110 | 17 | 3 Dhu al-Qa'dah 1447 AH | |
| Tue, Apr 21 | 2026-W17-2 | 111 | 17 | 4 Dhu al-Qa'dah 1447 AH | |
| Wed, Apr 22 | 2026-W17-3 | 112 | 17 | 5 Dhu al-Qa'dah 1447 AH | |
| Thu, Apr 23 | 2026-W17-4 | 113 | 17 | 6 Dhu al-Qa'dah 1447 AH | |
| Fri, Apr 24 | 2026-W17-5 | 114 | 17 | 7 Dhu al-Qa'dah 1447 AH | |
| Sat, Apr 25 | 2026-W17-6 | 115 | 17 | 8 Dhu al-Qa'dah 1447 AH | Anzac Day (4 sets) |
| Sun, Apr 26 | 2026-W17-7 | 116 | 18 | 9 Dhu al-Qa'dah 1447 AH |
About week 17
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 17 and Sunday US week 18.
Holidays this week: Anzac Day on Sat, Apr 25 in 4 of the countries and regions we cover. All weeks of 2026 lists the neighbouring weeks.
Week 17 in other years
| Year | Week 17 runs |
|---|---|
| 2024 | Mon, Apr 22 – Sun, Apr 28 |
| 2025 | Mon, Apr 21 – Sun, Apr 27 |
| 2026 | Mon, Apr 20 – Sun, Apr 26 |
| 2027 | Mon, Apr 26 – Sun, May 2 |
| 2028 | Mon, Apr 24 – Sun, Apr 30 |
| 2029 | Mon, Apr 23 – Sun, Apr 29 |
In 2027, week 17 runs Mon, Apr 26 – Sun, May 2: 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 17 falls between April 19 and April 26.
By the end of week 17, 116 days of 2026 have passed (31.8% of the year), and 36 ISO weeks of 2026 remain. The week falls in Q2.
Writing week 17
ISO 8601 writes this week as 2026-W17 (basic format 2026W17), from 2026-W17-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.