Week 11, 2027
March 15–21, 2027
Monday March 15 – Sunday March 212027-W11Days 74–80
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Mar 15 | 2027-W11-1 | 074 | 12 | 7 Shawwal 1448 AH | |
| Tue, Mar 16 | 2027-W11-2 | 075 | 12 | 8 Shawwal 1448 AH | |
| Wed, Mar 17 | 2027-W11-3 | 076 | 12 | 9 Shawwal 1448 AH | St Patrick's Day (UK: Northern Ireland); Saint Patrick's Day (Ireland) |
| Thu, Mar 18 | 2027-W11-4 | 077 | 12 | 10 Shawwal 1448 AH | |
| Fri, Mar 19 | 2027-W11-5 | 078 | 12 | 11 Shawwal 1448 AH | |
| Sat, Mar 20 | 2027-W11-6 | 079 | 12 | 12 Shawwal 1448 AH | |
| Sun, Mar 21 | 2027-W11-7 | 080 | 13 | 13 Shawwal 1448 AH | Palm Sunday; Nowruz 1406 |
About week 11
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 12 and Sunday US week 13.
Holidays this week: St Patrick's Day on Wed, Mar 17 in UK: Northern Ireland; Saint Patrick's Day on Wed, Mar 17 in Ireland. The March equinox is on Sat, Mar 20 at 20:25 UTC. Also this week: Palm Sunday on Sun, Mar 21 (the Sunday before Easter); Nowruz 1406 on Sun, Mar 21 (Persian New Year, 1 Farvardin). All weeks of 2027 lists the neighbouring weeks.
Week 11 in other years
| Year | Week 11 runs |
|---|---|
| 2025 | Mon, Mar 10 – Sun, Mar 16 |
| 2026 | Mon, Mar 9 – Sun, Mar 15 |
| 2027 | Mon, Mar 15 – Sun, Mar 21 |
| 2028 | Mon, Mar 13 – Sun, Mar 19 |
| 2029 | Mon, Mar 12 – Sun, Mar 18 |
| 2030 | Mon, Mar 11 – Sun, Mar 17 |
In 2028, week 11 runs Mon, Mar 13 – Sun, Mar 19: 364 days later, 2 days earlier in the calendar. Over the 400-year cycle, the Monday of week 11 falls between March 8 and March 15.
By the end of week 11, 80 days of 2027 have passed (21.9% of the year), and 41 ISO weeks of 2027 remain. The week falls in Q1.
Writing week 11
ISO 8601 writes this week as 2027-W11 (basic format 2027W11), from 2027-W11-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.