Week 25, 2026
June 15–21, 2026
Monday June 15 – Sunday June 212026-W25Days 166–172
The seven days
| Date | ISO week date | Day of year | US week | Islamic date (computed) | Holidays and other dates |
|---|---|---|---|---|---|
| Mon, Jun 15 | 2026-W25-1 | 166 | 25 | 29 Dhu al-Hijjah 1447 AH | World Cup bank holiday (UK: Scotland) |
| Tue, Jun 16 | 2026-W25-2 | 167 | 25 | 1 Muharram 1448 AH | Youth Day (South Africa); Islamic New Year 1448 AH |
| Wed, Jun 17 | 2026-W25-3 | 168 | 25 | 2 Muharram 1448 AH | |
| Thu, Jun 18 | 2026-W25-4 | 169 | 25 | 3 Muharram 1448 AH | |
| Fri, Jun 19 | 2026-W25-5 | 170 | 25 | 4 Muharram 1448 AH | Juneteenth National Independence Day (United States (federal)); Tuen Ng Festival (Hong Kong) |
| Sat, Jun 20 | 2026-W25-6 | 171 | 25 | 5 Muharram 1448 AH | |
| Sun, Jun 21 | 2026-W25-7 | 172 | 26 | 6 Muharram 1448 AH | Father’s Day (US, UK, Canada) |
About week 25
In US numbering, where weeks start on Sunday and the week of January 1 is week 1, Monday to Saturday are US week 25 and Sunday US week 26.
Holidays this week: World Cup bank holiday on Mon, Jun 15 in UK: Scotland; Youth Day on Tue, Jun 16 in South Africa; Juneteenth National Independence Day on Fri, Jun 19 in United States (federal); Tuen Ng Festival on Fri, Jun 19 in Hong Kong. The June solstice is on Sun, Jun 21 at 08:24 UTC. 1 Muharram 1448 AH falls on Tue, Jun 16 by the Umm al-Qura calendar (computed). Also this week: Islamic New Year 1448 AH on Tue, Jun 16 (1 Muharram, Umm al-Qura (computed)); Father’s Day (US, UK, Canada) on Sun, Jun 21 (third Sunday in June). All weeks of 2026 lists the neighbouring weeks.
Week 25 in other years
| Year | Week 25 runs |
|---|---|
| 2024 | Mon, Jun 17 – Sun, Jun 23 |
| 2025 | Mon, Jun 16 – Sun, Jun 22 |
| 2026 | Mon, Jun 15 – Sun, Jun 21 |
| 2027 | Mon, Jun 21 – Sun, Jun 27 |
| 2028 | Mon, Jun 19 – Sun, Jun 25 |
| 2029 | Mon, Jun 18 – Sun, Jun 24 |
In 2027, week 25 runs Mon, Jun 21 – Sun, Jun 27: 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 25 falls between June 14 and June 21.
By the end of week 25, 172 days of 2026 have passed (47.1% of the year), and 28 ISO weeks of 2026 remain. The week falls in Q2.
Writing week 25
ISO 8601 writes this week as 2026-W25 (basic format 2026W25), from 2026-W25-1 on Monday to -7 on Sunday. The week number page shows the spreadsheet and Python formulas that give these numbers.