Week 43, 2026
October 19–25, 2026
Monday October 19 – Sunday October 252026-W43Days 292–298
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Oct 19 | 2026-W43-1 | 292 | 43 | 8 Jumada al-Ula 1448 AH | Chung Yeung Festival (substitute day) (Hong Kong) |
| Tue, Oct 20 | 2026-W43-2 | 293 | 43 | 9 Jumada al-Ula 1448 AH | |
| Wed, Oct 21 | 2026-W43-3 | 294 | 43 | 10 Jumada al-Ula 1448 AH | |
| Thu, Oct 22 | 2026-W43-4 | 295 | 43 | 11 Jumada al-Ula 1448 AH | |
| Fri, Oct 23 | 2026-W43-5 | 296 | 43 | 12 Jumada al-Ula 1448 AH | |
| Sat, Oct 24 | 2026-W43-6 | 297 | 43 | 13 Jumada al-Ula 1448 AH | |
| Sun, Oct 25 | 2026-W43-7 | 298 | 44 | 14 Jumada al-Ula 1448 AH |
About week 43
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 43 and Sunday US week 44.
Holidays this week: Chung Yeung Festival (substitute day) on Mon, Oct 19 in Hong Kong. On Sun, Oct 25 clocks in the United Kingdom and Ireland go back one hour at 2:00 a.m. On Sun, Oct 25 clocks in the European Union (Central European Time) go back one hour at 3:00 a.m. All weeks of 2026 lists the neighbouring weeks.
Week 43 in other years
| Year | Week 43 runs |
|---|---|
| 2024 | Mon, Oct 21 – Sun, Oct 27 |
| 2025 | Mon, Oct 20 – Sun, Oct 26 |
| 2026 | Mon, Oct 19 – Sun, Oct 25 |
| 2027 | Mon, Oct 25 – Sun, Oct 31 |
| 2028 | Mon, Oct 23 – Sun, Oct 29 |
| 2029 | Mon, Oct 22 – Sun, Oct 28 |
In 2027, week 43 runs Mon, Oct 25 – Sun, Oct 31: 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 43 falls between October 18 and October 25.
By the end of week 43, 298 days of 2026 have passed (81.6% of the year), and 10 ISO weeks of 2026 remain. The week falls in Q4.
Writing week 43
ISO 8601 writes this week as 2026-W43 (basic format 2026W43), from 2026-W43-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.