Week numbers 2030
All 52 ISO weeks of 2030 with their exact dates. 2030 starts on a Tuesday, has 365 days, and counts 52 calendar weeks. Week 1 begins Dec 31, 2029; week 52 ends Dec 29, 2030.
2030 has 52 ISO weeks. Week 1: Dec 31 – Jan 6, 2030. Week 52: Dec 23 – Dec 29, 2030.
Week number chart 2030
| Week number | From (Monday) | To (Sunday) | Month | Quarter |
|---|---|---|---|---|
| Week 1 | Dec 31, 2029 | Jan 6 | Dec / Jan | Q1 |
| Week 2 | Jan 7 | Jan 13 | January | Q1 |
| Week 3 | Jan 14 | Jan 20 | January | Q1 |
| Week 4 | Jan 21 | Jan 27 | January | Q1 |
| Week 5 | Jan 28 | Feb 3 | Jan / Feb | Q1 |
| Week 6 | Feb 4 | Feb 10 | February | Q1 |
| Week 7 | Feb 11 | Feb 17 | February | Q1 |
| Week 8 | Feb 18 | Feb 24 | February | Q1 |
| Week 9 | Feb 25 | Mar 3 | Feb / Mar | Q1 |
| Week 10 | Mar 4 | Mar 10 | March | Q1 |
| Week 11 | Mar 11 | Mar 17 | March | Q1 |
| Week 12 | Mar 18 | Mar 24 | March | Q1 |
| Week 13 | Mar 25 | Mar 31 | March | Q1 |
| Week 14 | Apr 1 | Apr 7 | April | Q2 |
| Week 15 | Apr 8 | Apr 14 | April | Q2 |
| Week 16 | Apr 15 | Apr 21 | April | Q2 |
| Week 17 | Apr 22 | Apr 28 | April | Q2 |
| Week 18 | Apr 29 | May 5 | Apr / May | Q2 |
| Week 19 | May 6 | May 12 | May | Q2 |
| Week 20 | May 13 | May 19 | May | Q2 |
| Week 21 | May 20 | May 26 | May | Q2 |
| Week 22 | May 27 | Jun 2 | May / Jun | Q2 |
| Week 23 | Jun 3 | Jun 9 | June | Q2 |
| Week 24 | Jun 10 | Jun 16 | June | Q2 |
| Week 25 | Jun 17 | Jun 23 | June | Q2 |
| Week 26 | Jun 24 | Jun 30 | June | Q2 |
| Week 27 | Jul 1 | Jul 7 | July | Q3 |
| Week 28 | Jul 8 | Jul 14 | July | Q3 |
| Week 29 | Jul 15 | Jul 21 | July | Q3 |
| Week 30 | Jul 22 | Jul 28 | July | Q3 |
| Week 31 | Jul 29 | Aug 4 | Jul / Aug | Q3 |
| Week 32 | Aug 5 | Aug 11 | August | Q3 |
| Week 33 | Aug 12 | Aug 18 | August | Q3 |
| Week 34 | Aug 19 | Aug 25 | August | Q3 |
| Week 35 | Aug 26 | Sep 1 | Aug / Sep | Q3 |
| Week 36 | Sep 2 | Sep 8 | September | Q3 |
| Week 37 | Sep 9 | Sep 15 | September | Q3 |
| Week 38 | Sep 16 | Sep 22 | September | Q3 |
| Week 39 | Sep 23 | Sep 29 | September | Q3 |
| Week 40 | Sep 30 | Oct 6 | Sep / Oct | Q4 |
| Week 41 | Oct 7 | Oct 13 | October | Q4 |
| Week 42 | Oct 14 | Oct 20 | October | Q4 |
| Week 43 | Oct 21 | Oct 27 | October | Q4 |
| Week 44 | Oct 28 | Nov 3 | Oct / Nov | Q4 |
| Week 45 | Nov 4 | Nov 10 | November | Q4 |
| Week 46 | Nov 11 | Nov 17 | November | Q4 |
| Week 47 | Nov 18 | Nov 24 | November | Q4 |
| Week 48 | Nov 25 | Dec 1 | Nov / Dec | Q4 |
| Week 49 | Dec 2 | Dec 8 | December | Q4 |
| Week 50 | Dec 9 | Dec 15 | December | Q4 |
| Week 51 | Dec 16 | Dec 22 | December | Q4 |
| Week 52 | Dec 23 | Dec 29 | December | Q4 |
Note that week 1 of 2030 starts on Dec 31, 2029 — the last days of December 2029 belong to 2030's week 1 under ISO rules. Weeks follow ISO 8601 (Monday start, week 1 contains January 4).
2030 week numbers by month
Which ISO weeks fall in each month of 2030, and how many weeks start (on a Monday) in that month.
| Month | Week numbers | Weeks starting | Month starts |
|---|---|---|---|
| January | 1–5 | 4 | Jan 1 (Tue) |
| February | 5–9 | 4 | Feb 1 (Fri) |
| March | 9–13 | 4 | Mar 1 (Fri) |
| April | 14–18 | 5 | Apr 1 (Mon) |
| May | 18–22 | 4 | May 1 (Wed) |
| June | 22–26 | 4 | Jun 1 (Sat) |
| July | 27–31 | 5 | Jul 1 (Mon) |
| August | 31–35 | 4 | Aug 1 (Thu) |
| September | 35–40 | 5 | Sep 1 (Sun) |
| October | 40–44 | 4 | Oct 1 (Tue) |
| November | 44–48 | 4 | Nov 1 (Fri) |
| December | 48–52, 1 (2031) | 5 | Dec 1 (Sun) |
Holidays and key dates 2030 by week number
| Date | Day | ISO week | US week |
|---|---|---|---|
| New Year's Day | Tuesday, Jan 1, 2030 | Week 1 | Week 1 |
| Valentine's Day | Thursday, Feb 14, 2030 | Week 7 | Week 7 |
| Easter Sunday | Sunday, Apr 21, 2030 | Week 16 | Week 17 |
| Mother's Day (US) | Sunday, May 12, 2030 | Week 19 | Week 20 |
| Memorial Day (US) | Monday, May 27, 2030 | Week 22 | Week 22 |
| Father's Day (US) | Sunday, Jun 16, 2030 | Week 24 | Week 25 |
| Independence Day (US) | Thursday, Jul 4, 2030 | Week 27 | Week 27 |
| Labor Day (US) | Monday, Sep 2, 2030 | Week 36 | Week 36 |
| Halloween | Thursday, Oct 31, 2030 | Week 44 | Week 44 |
| Thanksgiving (US) | Thursday, Nov 28, 2030 | Week 48 | Week 48 |
| Black Friday | Friday, Nov 29, 2030 | Week 48 | Week 48 |
| Christmas Day | Wednesday, Dec 25, 2030 | Week 52 | Week 52 |
| New Year's Eve | Tuesday, Dec 31, 2030 | Week 1 (2031) | Week 53 |
US (Sunday-start) week numbers in 2030
The chart above uses ISO 8601 (Monday start). US calendars, Outlook in US locale and Excel's default
WEEKNUM() count differently: weeks start on Sunday and week 1 is the week containing
January 1. In 2030, US week 1 runs from Sunday, Dec 30, 2029 to Saturday, Jan 5, 2030,
and the year has 53 US week numbers (the last one is partial).
For Monday–Saturday the US week number is the same as the ISO week number; on Sundays it is one higher (because the US week has already rolled over). To convert any single date, use the week number calculator — it shows both systems. Background: week start conventions.
Other years
Frequently asked questions
How many weeks does 2030 have?
2030 has 52 ISO weeks. Like most years it has 52 numbered weeks; the nearest 53-week years are 2026, 2032, 2037.
When does week 1 of 2030 start?
Week 1 of 2030 runs from Monday, Dec 31, 2029 to Sunday, Jan 6, 2030 — it is the week containing January 4. 2030 itself begins on a Tuesday.
When does the last week of 2030 end?
Week 52, the final week of 2030, runs from Dec 23, 2030 to Dec 29, 2030.
Is 2030 a leap year?
No — 2030 has 365 days, which is 52 weeks and 1 day.
What week number is Christmas 2030?
Christmas Day 2030 (Wednesday, Dec 25, 2030) is in ISO week 52 and US week 52. Thanksgiving (Nov 28, 2030) is in ISO week 48, and July 4 is in ISO week 27.
Do US week numbers differ from ISO week numbers in 2030?
Mostly not: from Monday to Saturday the US (Sunday-start) week number equals the ISO week number in 2030; only Sundays are one ahead.