Week 16, 2027
April 19–25, 2027
Monday April 19 – Sunday April 252027-W16Days 109–115
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Apr 19 | 2027-W16-1 | 109 | 17 | 12 Dhu al-Qa'dah 1448 AH | |
| Tue, Apr 20 | 2027-W16-2 | 110 | 17 | 13 Dhu al-Qa'dah 1448 AH | |
| Wed, Apr 21 | 2027-W16-3 | 111 | 17 | 14 Dhu al-Qa'dah 1448 AH | |
| Thu, Apr 22 | 2027-W16-4 | 112 | 17 | 15 Dhu al-Qa'dah 1448 AH | Passover (first day) |
| Fri, Apr 23 | 2027-W16-5 | 113 | 17 | 16 Dhu al-Qa'dah 1448 AH | |
| Sat, Apr 24 | 2027-W16-6 | 114 | 17 | 17 Dhu al-Qa'dah 1448 AH | |
| Sun, Apr 25 | 2027-W16-7 | 115 | 18 | 18 Dhu al-Qa'dah 1448 AH | Anzac Day (Australia (national), Australia: New South Wales, Australia: Western Australia) |
About week 16
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 Sun, Apr 25 in Australia (national), Australia: New South Wales, Australia: Western Australia. Also this week: Passover (first day) on Thu, Apr 22 (15 Nisan; begins at sunset the evening before). All weeks of 2027 lists the neighbouring weeks.
Week 16 in other years
| Year | Week 16 runs |
|---|---|
| 2025 | Mon, Apr 14 – Sun, Apr 20 |
| 2026 | Mon, Apr 13 – Sun, Apr 19 |
| 2027 | Mon, Apr 19 – Sun, Apr 25 |
| 2028 | Mon, Apr 17 – Sun, Apr 23 |
| 2029 | Mon, Apr 16 – Sun, Apr 22 |
| 2030 | Mon, Apr 15 – Sun, Apr 21 |
In 2028, week 16 runs Mon, Apr 17 – Sun, Apr 23: 364 days later, 2 days earlier in the calendar. Over the 400-year cycle, the Monday of week 16 falls between April 12 and April 19.
By the end of week 16, 115 days of 2027 have passed (31.5% of the year), and 36 ISO weeks of 2027 remain. The week falls in Q2.
Writing week 16
ISO 8601 writes this week as 2027-W16 (basic format 2027W16), from 2027-W16-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.