Week 43, 2027
October 25–31, 2027
Monday October 25 – Sunday October 312027-W43Days 298–304
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Oct 25 | 2027-W43-1 | 298 | 44 | 25 Jumada al-Ula 1449 AH | October Bank Holiday (Ireland); Labour Day (New Zealand) |
| Tue, Oct 26 | 2027-W43-2 | 299 | 44 | 26 Jumada al-Ula 1449 AH | |
| Wed, Oct 27 | 2027-W43-3 | 300 | 44 | 27 Jumada al-Ula 1449 AH | |
| Thu, Oct 28 | 2027-W43-4 | 301 | 44 | 28 Jumada al-Ula 1449 AH | Deepavali (Singapore) |
| Fri, Oct 29 | 2027-W43-5 | 302 | 44 | 29 Jumada al-Ula 1449 AH | |
| Sat, Oct 30 | 2027-W43-6 | 303 | 44 | 30 Jumada al-Ula 1449 AH | |
| Sun, Oct 31 | 2027-W43-7 | 304 | 45 | 1 Jumada al-Akhirah 1449 AH | Halloween |
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 44 and Sunday US week 45.
Holidays this week: October Bank Holiday on Mon, Oct 25 in Ireland; Labour Day on Mon, Oct 25 in New Zealand; Deepavali on Thu, Oct 28 in Singapore. On Sun, Oct 31 clocks in the United Kingdom and Ireland go back one hour at 2:00 a.m. On Sun, Oct 31 clocks in the European Union (Central European Time) go back one hour at 3:00 a.m. 1 Jumada al-Akhirah 1449 AH falls on Sun, Oct 31 by the Umm al-Qura calendar (computed). Also this week: Halloween on Sun, Oct 31 (October 31). All weeks of 2027 lists the neighbouring weeks.
Week 43 in other years
| Year | Week 43 runs |
|---|---|
| 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 |
| 2030 | Mon, Oct 21 – Sun, Oct 27 |
In 2028, week 43 runs Mon, Oct 23 – Sun, Oct 29: 364 days later, 2 days earlier 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, 304 days of 2027 have passed (83.3% of the year), and 9 ISO weeks of 2027 remain. The week falls in Q4.
Writing week 43
ISO 8601 writes this week as 2027-W43 (basic format 2027W43), from 2027-W43-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.