Week 9, 2026
February 23 – March 1, 2026
Monday February 23 – Sunday March 12026-W09Days 54–60
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Feb 23 | 2026-W09-1 | 054 | 9 | 6 Ramadan 1447 AH | The Emperor's Birthday (Japan) |
| Tue, Feb 24 | 2026-W09-2 | 055 | 9 | 7 Ramadan 1447 AH | |
| Wed, Feb 25 | 2026-W09-3 | 056 | 9 | 8 Ramadan 1447 AH | |
| Thu, Feb 26 | 2026-W09-4 | 057 | 9 | 9 Ramadan 1447 AH | |
| Fri, Feb 27 | 2026-W09-5 | 058 | 9 | 10 Ramadan 1447 AH | |
| Sat, Feb 28 | 2026-W09-6 | 059 | 9 | 11 Ramadan 1447 AH | |
| Sun, Mar 1 | 2026-W09-7 | 060 | 10 | 12 Ramadan 1447 AH |
About week 9
The week spans two months: it starts in February and ends in March, with March 1 on Sunday. In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 9 and Sunday US week 10.
Holidays this week: The Emperor's Birthday on Mon, Feb 23 in Japan. All weeks of 2026 lists the neighbouring weeks.
Week 9 in other years
| Year | Week 9 runs |
|---|---|
| 2024 | Mon, Feb 26 – Sun, Mar 3 |
| 2025 | Mon, Feb 24 – Sun, Mar 2 |
| 2026 | Mon, Feb 23 – Sun, Mar 1 |
| 2027 | Mon, Mar 1 – Sun, Mar 7 |
| 2028 | Mon, Feb 28 – Sun, Mar 5 |
| 2029 | Mon, Feb 26 – Sun, Mar 4 |
In 2027, week 9 runs Mon, Mar 1 – Sun, Mar 7: 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 9 falls between February 23 and March 1.
By the end of week 9, 60 days of 2026 have passed (16.4% of the year), and 44 ISO weeks of 2026 remain. The week falls in Q1.
Writing week 9
ISO 8601 writes this week as 2026-W09 (basic format 2026W09), from 2026-W09-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.