Find the current week number and use our week number calculator to determine the week number for any date.
Current Week Number Calculator
What is a Week Number?
A week number is a way to identify a specific week of the year, with the first week of the year being the one that contains at least four days of the new year. Week numbers are commonly used in business, education, and international trade to facilitate planning and communication.
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Week Numbers for 2025
| Week Number | Start Date (Monday) | End Date (Sunday) |
|---|---|---|
| 1 | Dec 30, 2024 | Jan 5, 2025 |
| 2 | Jan 6, 2025 | Jan 12, 2025 |
| 3 | Jan 13, 2025 | Jan 19, 2025 |
| 4 | Jan 20, 2025 | Jan 26, 2025 |
| 5 | Jan 27, 2025 | Feb 2, 2025 |
| 6 | Feb 3, 2025 | Feb 9, 2025 |
| 7 | Feb 10, 2025 | Feb 16, 2025 |
| 8 | Feb 17, 2025 | Feb 23, 2025 |
| 9 | Feb 24, 2025 | Mar 2, 2025 |
| 10 | Mar 3, 2025 | Mar 9, 2025 |
| 11 | Mar 10, 2025 | Mar 16, 2025 |
| 12 | Mar 17, 2025 | Mar 23, 2025 |
| 13 | Mar 24, 2025 | Mar 30, 2025 |
| 14 | Mar 31, 2025 | Apr 6, 2025 |
| 15 | Apr 7, 2025 | Apr 13, 2025 |
| 16 | Apr 14, 2025 | Apr 20, 2025 |
| 17 | Apr 21, 2025 | Apr 27, 2025 |
| 18 | Apr 28, 2025 | May 4, 2025 |
| 19 | May 5, 2025 | May 11, 2025 |
| 20 | May 12, 2025 | May 18, 2025 |
| 21 | May 19, 2025 | May 25, 2025 |
| 22 | May 26, 2025 | Jun 1, 2025 |
| 23 | Jun 2, 2025 | Jun 8, 2025 |
| 24 | Jun 9, 2025 | Jun 15, 2025 |
| 25 | Jun 16, 2025 | Jun 22, 2025 |
| 26 | Jun 23, 2025 | Jun 29, 2025 |
| 27 | Jun 30, 2025 | Jul 6, 2025 |
| 28 | Jul 7, 2025 | Jul 13, 2025 |
| 29 | Jul 14, 2025 | Jul 20, 2025 |
| 30 | Jul 21, 2025 | Jul 27, 2025 |
| 31 | Jul 28, 2025 | Aug 3, 2025 |
| 32 | Aug 4, 2025 | Aug 10, 2025 |
| 33 | Aug 11, 2025 | Aug 17, 2025 |
| 34 | Aug 18, 2025 | Aug 24, 2025 |
| 35 | Aug 25, 2025 | Aug 31, 2025 |
| 36 | Sep 1, 2025 | Sep 7, 2025 |
| 37 | Sep 8, 2025 | Sep 14, 2025 |
| 38 | Sep 15, 2025 | Sep 21, 2025 |
| 39 | Sep 22, 2025 | Sep 28, 2025 |
| 40 | Sep 29, 2025 | Oct 5, 2025 |
| 41 | Oct 6, 2025 | Oct 12, 2025 |
| 42 | Oct 13, 2025 | Oct 19, 2025 |
| 43 | Oct 20, 2025 | Oct 26, 2025 |
| 44 | Oct 27, 2025 | Nov 2, 2025 |
| 45 | Nov 3, 2025 | Nov 9, 2025 |
| 46 | Nov 10, 2025 | Nov 16, 2025 |
| 47 | Nov 17, 2025 | Nov 23, 2025 |
| 48 | Nov 24, 2025 | Nov 30, 2025 |
| 49 | Dec 1, 2025 | Dec 7, 2025 |
| 50 | Dec 8, 2025 | Dec 14, 2025 |
| 51 | Dec 15, 2025 | Dec 21, 2025 |
| 52 | Dec 22, 2025 | Dec 28, 2025 |
Summary
- 2025 has 52 ISO weeks.
- Week 1 of 2025 begins on Monday, December 30, 2024.
- Week 52 of 2025 ends on Sunday, December 28, 2025.
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