Week numbers 2028
2028 has 52 weeks. Week 1 runs from Monday, January 3, 2028 to Sunday, January 9, 2028, and week 52 ends on Sunday, December 31, 2028. The dates below follow ISO 8601: weeks start on Monday, and week 1 is the week with the year's first Thursday.
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Dates of a week
Week numbers 2028
ISO 8601 weeks start on Monday, and week 1 is the week with the year's first Thursday.
| Week | Monday | Sunday |
|---|---|---|
| 1 | Jan 3 | Jan 9 |
| 2 | Jan 10 | Jan 16 |
| 3 | Jan 17 | Jan 23 |
| 4 | Jan 24 | Jan 30 |
| 5 | Jan 31 | Feb 6 |
| 6 | Feb 7 | Feb 13 |
| 7 | Feb 14 | Feb 20 |
| 8 | Feb 21 | Feb 27 |
| 9 | Feb 28 | Mar 5 |
| 10 | Mar 6 | Mar 12 |
| 11 | Mar 13 | Mar 19 |
| 12 | Mar 20 | Mar 26 |
| 13 | Mar 27 | Apr 2 |
| 14 | Apr 3 | Apr 9 |
| 15 | Apr 10 | Apr 16 |
| 16 | Apr 17 | Apr 23 |
| 17 | Apr 24 | Apr 30 |
| 18 | May 1 | May 7 |
| 19 | May 8 | May 14 |
| 20 | May 15 | May 21 |
| 21 | May 22 | May 28 |
| 22 | May 29 | Jun 4 |
| 23 | Jun 5 | Jun 11 |
| 24 | Jun 12 | Jun 18 |
| 25 | Jun 19 | Jun 25 |
| 26 | Jun 26 | Jul 2 |
| Week | Monday | Sunday |
|---|---|---|
| 27 | Jul 3 | Jul 9 |
| 28 | Jul 10 | Jul 16 |
| 29 | Jul 17 | Jul 23 |
| 30 | Jul 24 | Jul 30 |
| 31 | Jul 31 | Aug 6 |
| 32 | Aug 7 | Aug 13 |
| 33 | Aug 14 | Aug 20 |
| 34 | Aug 21 | Aug 27 |
| 35 | Aug 28 | Sep 3 |
| 36 | Sep 4 | Sep 10 |
| 37 | Sep 11 | Sep 17 |
| 38 | Sep 18 | Sep 24 |
| 39 | Sep 25 | Oct 1 |
| 40 | Oct 2 | Oct 8 |
| 41 | Oct 9 | Oct 15 |
| 42 | Oct 16 | Oct 22 |
| 43 | Oct 23 | Oct 29 |
| 44 | Oct 30 | Nov 5 |
| 45 | Nov 6 | Nov 12 |
| 46 | Nov 13 | Nov 19 |
| 47 | Nov 20 | Nov 26 |
| 48 | Nov 27 | Dec 3 |
| 49 | Dec 4 | Dec 10 |
| 50 | Dec 11 | Dec 17 |
| 51 | Dec 18 | Dec 24 |
| 52 | Dec 25 | Dec 31 |
Week numbers in your calendar
Each Monday gets an all day event with its week number, from last year to three years ahead. Subscribe once and it stays up to date.
For scripts and AI agents, every week of 2028 is also plain JSON: 2028.json.
Need the days or working days between two dates? Use the day counter.
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Questions
- How are week numbers counted?
With ISO 8601, the standard Europe and most of the world use. Weeks start on Monday, and week 1 is the week with the year's first Thursday, which is also the week with January 4. So the last days of December can be in week 1 of the next year, and the first days of January in week 52 or 53 of the year before.
- How many weeks are in 2028?
2028 has 52 ISO weeks. A year has 53 weeks when it starts on a Thursday, or on a Wednesday in a leap year. 2026 and 2032 have 53, 2027 and 2028 have 52.
- When does week 1 of 2028 start?
On Monday, January 3, 2028. It ends on Sunday, January 9, 2028.
- Why is my US colleague's week number different?
In the US, weeks usually start on Sunday and week 1 is the week of January 1, whatever day that is. Both systems often agree, but not always: in years like 2027, where January 1 is a Friday, the US week number is one higher than the ISO one for most of the year. Pick US (Sunday) at the top of this page to see the US numbers.
- How do I show week numbers in Google Calendar?
On the web, click the gear icon, then Settings > General > View options, and check Show week numbers. To see the number as an event on your phone too, subscribe to the week numbers calendar under Week numbers in your calendar on this page.
- How do I show week numbers in Outlook?
In the new Outlook and Outlook on the web, open the calendar, then View > Calendar settings > Calendar appearance, check Show week numbers and save. For ISO numbers, set Start the first week of the year on to the first four-day week. In classic Outlook, go to File > Options > Calendar and check Show week numbers in the month view and in the Date Navigator.
- How do I get the week number of a date in Excel or Google Sheets?
Use
=ISOWEEKNUM(A1)for the ISO week number of the date in A1.=WEEKNUM(A1)gives the US week number, with weeks starting on Sunday.
Reminders in Slack
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