Calendar
All twelve months of 2025, with ISO week numbers. Weeks start on Monday; switch to Sunday if you prefer.
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 1 | 1 | 2 | 3 | 4 | 5 | ||
| 2 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 3 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 4 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 5 | 27 | 28 | 29 | 30 | 31 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 5 | 1 | 2 | |||||
| 6 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 7 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 8 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 9 | 24 | 25 | 26 | 27 | 28 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 9 | 1 | 2 | |||||
| 10 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 11 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 12 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 13 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| 14 | 31 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 14 | 1 | 2 | 3 | 4 | 5 | 6 | |
| 15 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 16 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 17 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 18 | 28 | 29 | 30 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 18 | 1 | 2 | 3 | 4 | |||
| 19 | 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 20 | 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 21 | 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 22 | 26 | 27 | 28 | 29 | 30 | 31 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 22 | 1 | ||||||
| 23 | 2 | 3 | 4 | 5 | 6 | 7 | 8 |
| 24 | 9 | 10 | 11 | 12 | 13 | 14 | 15 |
| 25 | 16 | 17 | 18 | 19 | 20 | 21 | 22 |
| 26 | 23 | 24 | 25 | 26 | 27 | 28 | 29 |
| 27 | 30 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 27 | 1 | 2 | 3 | 4 | 5 | 6 | |
| 28 | 7 | 8 | 9 | 10 | 11 | 12 | 13 |
| 29 | 14 | 15 | 16 | 17 | 18 | 19 | 20 |
| 30 | 21 | 22 | 23 | 24 | 25 | 26 | 27 |
| 31 | 28 | 29 | 30 | 31 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 31 | 1 | 2 | 3 | ||||
| 32 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
| 33 | 11 | 12 | 13 | 14 | 15 | 16 | 17 |
| 34 | 18 | 19 | 20 | 21 | 22 | 23 | 24 |
| 35 | 25 | 26 | 27 | 28 | 29 | 30 | 31 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 36 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 37 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 38 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 39 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 40 | 29 | 30 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 40 | 1 | 2 | 3 | 4 | 5 | ||
| 41 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| 42 | 13 | 14 | 15 | 16 | 17 | 18 | 19 |
| 43 | 20 | 21 | 22 | 23 | 24 | 25 | 26 |
| 44 | 27 | 28 | 29 | 30 | 31 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 44 | 1 | 2 | |||||
| 45 | 3 | 4 | 5 | 6 | 7 | 8 | 9 |
| 46 | 10 | 11 | 12 | 13 | 14 | 15 | 16 |
| 47 | 17 | 18 | 19 | 20 | 21 | 22 | 23 |
| 48 | 24 | 25 | 26 | 27 | 28 | 29 | 30 |
| Wk | Mon | Tue | Wed | Thu | Fri | Sat | Sun |
|---|---|---|---|---|---|---|---|
| 49 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
| 50 | 8 | 9 | 10 | 11 | 12 | 13 | 14 |
| 51 | 15 | 16 | 17 | 18 | 19 | 20 | 21 |
| 52 | 22 | 23 | 24 | 25 | 26 | 27 | 28 |
| 1 | 29 | 30 | 31 |
Calendar
365
52
2025 has 52 ISO weeks; week 1 starts on Monday, 30 December 2024.
Wednesday, 1 January 2025
Wednesday, 31 December 2025
2025 is not a leap year: 365 days. The next leap year is 2028.
Clock changes
Sunday, 30 March 2025 at 02:00: clocks go forward 1 hour to 03:00 (CET → CEST).
Sunday, 26 October 2025 at 03:00: clocks go back 1 hour to 02:00 (CEST → CET).
The EU and the UK change at 01:00 UTC on the last Sunday of March and of October, at the same moment in every country.
Sunday, 9 March 2025 at 02:00: clocks go forward 1 hour to 03:00 (EST → EDT).
Sunday, 2 November 2025 at 02:00: clocks go back 1 hour to 01:00 (EDT → EST).
How it works
ISO 8601 weeks start on Monday, and week 1 is the week that contains the year’s first Thursday (equivalently, 4 January). A year therefore has 52 or 53 weeks, and the first days of January can belong to the last week of the previous year.
The Gregorian leap-year rule: a year divisible by 4 is a leap year, except years divisible by 100, unless they are also divisible by 400. So 2000 was a leap year and 2100 will not be.
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2025 has 52 ISO weeks; week 1 starts on Monday, 30 December 2024.
2025 is not a leap year: 365 days. The next leap year is 2028.
In the EU and the UK: Sunday, 30 March 2025 at 02:00: clocks go forward 1 hour to 03:00 (CET → CEST); Sunday, 26 October 2025 at 03:00: clocks go back 1 hour to 02:00 (CEST → CET). In the US: Sunday, 9 March 2025 at 02:00: clocks go forward 1 hour to 03:00 (EST → EDT); Sunday, 2 November 2025 at 02:00: clocks go back 1 hour to 01:00 (EDT → EST).