Week Numbers 2030
2030 has 52 ISO weeks. Week 1 is the week with the year's first Thursday, and every week runs Monday to Sunday.
Below is the full list of 2030 week numbers with the exact Monday start date and Sunday end date for each week — plus a plain-language explainer of how ISO week numbering works and who uses it.
How 2030 numbers its weeks: 2030 starts on a Tuesday, so ISO week 1 begins on Monday December 31, 2029. The year runs through week 52, which ends on December 29, 2030. Like most years, 2030 fits into the standard 52 weeks.
What Are ISO Week Numbers?
An ISO week number is a simple way to name a week with a number from 1 to 52 or 53, instead of a range of dates. Saying "week 32" is shorter than "the week of August 3" and means the same thing to anyone using the standard. The rules come from ISO 8601, an international date standard, so a week number means the same thing worldwide.
How week numbering works
Two rules cover almost everything:
- Weeks start on Monday and end on Sunday.
- Week 1 is the week that holds the year's first Thursday — the same as the week that contains January 4.
Because of that first-Thursday rule, the first few days of January can belong to the last week of the previous year, and the last days of December can belong to week 1 of the next year. That's normal, not a mistake.
Why 2030 has 52 weeks
Most years, including 2030, have 52 ISO weeks. A year only gets a 53rd week when it starts on a Thursday (or a Wednesday in a leap year). 2030 starts on a Tuesday, so it has the usual 52.
Who uses week numbers?
- Payroll and finance — weekly and bi-weekly pay periods.
- Project and agile teams — sprints and delivery schedules often run by week number.
- Manufacturing and logistics — production and shipping plans use "CW" (calendar week) or "KW" in Europe.
- Schools and universities — term weeks and teaching schedules.
Tip: switch any of our monthly calendars to the Monday-start view and the week numbers appear right on the grid — handy for printing a wall calendar that shows them.
The Full 2030 Week Number Table
Every ISO week that touches 2030, with its Monday start and Sunday end. Weeks shown with another year in brackets belong to that year's numbering.
| Week | From (Monday) | To (Sunday) |
|---|---|---|
| W01 | December 31, 2029 | January 6, 2030 |
| W02 | January 7, 2030 | January 13, 2030 |
| W03 | January 14, 2030 | January 20, 2030 |
| W04 | January 21, 2030 | January 27, 2030 |
| W05 | January 28, 2030 | February 3, 2030 |
| W06 | February 4, 2030 | February 10, 2030 |
| W07 | February 11, 2030 | February 17, 2030 |
| W08 | February 18, 2030 | February 24, 2030 |
| W09 | February 25, 2030 | March 3, 2030 |
| W10 | March 4, 2030 | March 10, 2030 |
| W11 | March 11, 2030 | March 17, 2030 |
| W12 | March 18, 2030 | March 24, 2030 |
| W13 | March 25, 2030 | March 31, 2030 |
| W14 | April 1, 2030 | April 7, 2030 |
| W15 | April 8, 2030 | April 14, 2030 |
| W16 | April 15, 2030 | April 21, 2030 |
| W17 | April 22, 2030 | April 28, 2030 |
| W18 | April 29, 2030 | May 5, 2030 |
| W19 | May 6, 2030 | May 12, 2030 |
| W20 | May 13, 2030 | May 19, 2030 |
| W21 | May 20, 2030 | May 26, 2030 |
| W22 | May 27, 2030 | June 2, 2030 |
| W23 | June 3, 2030 | June 9, 2030 |
| W24 | June 10, 2030 | June 16, 2030 |
| W25 | June 17, 2030 | June 23, 2030 |
| W26 | June 24, 2030 | June 30, 2030 |
| W27 | July 1, 2030 | July 7, 2030 |
| W28 | July 8, 2030 | July 14, 2030 |
| W29 | July 15, 2030 | July 21, 2030 |
| W30 | July 22, 2030 | July 28, 2030 |
| W31 | July 29, 2030 | August 4, 2030 |
| W32 | August 5, 2030 | August 11, 2030 |
| W33 | August 12, 2030 | August 18, 2030 |
| W34 | August 19, 2030 | August 25, 2030 |
| W35 | August 26, 2030 | September 1, 2030 |
| W36 | September 2, 2030 | September 8, 2030 |
| W37 | September 9, 2030 | September 15, 2030 |
| W38 | September 16, 2030 | September 22, 2030 |
| W39 | September 23, 2030 | September 29, 2030 |
| W40 | September 30, 2030 | October 6, 2030 |
| W41 | October 7, 2030 | October 13, 2030 |
| W42 | October 14, 2030 | October 20, 2030 |
| W43 | October 21, 2030 | October 27, 2030 |
| W44 | October 28, 2030 | November 3, 2030 |
| W45 | November 4, 2030 | November 10, 2030 |
| W46 | November 11, 2030 | November 17, 2030 |
| W47 | November 18, 2030 | November 24, 2030 |
| W48 | November 25, 2030 | December 1, 2030 |
| W49 | December 2, 2030 | December 8, 2030 |
| W50 | December 9, 2030 | December 15, 2030 |
| W51 | December 16, 2030 | December 22, 2030 |
| W52 | December 23, 2030 | December 29, 2030 |
| W01 (2031) | December 30, 2030 | January 5, 2031 |