Week 27 of 2026 runs June 29 to July 5
ISO week 27 of 2026 begins on Monday, June 29, 2026 and ends on Sunday, July 5, 2026. It has already passed; the current week is 39. The week covers the turn from June into July.
What dates are in week 27?
| Weekday | Date | Day of year | Notes |
|---|---|---|---|
| Monday | June 29, 2026 | 180 | |
| Tuesday | June 30, 2026 | 181 | |
| Wednesday | July 1, 2026 | 182 | |
| Thursday | July 2, 2026 | 183 | |
| Friday | July 3, 2026 | 184 | |
| Saturday | July 4, 2026 | 185 | Independence Day |
| Sunday | July 5, 2026 | 186 |
Week 27 of 2026 contains Independence Day on July 4. The seven dates always run Monday through Sunday, which is the part of ISO 8601 that most often catches people out: a week that starts on Sunday is a different convention and gives a different number.
How ISO week 27 is worked out
ISO 8601 fixes week one as the week containing the first Thursday of January, which is the same as saying the week containing 4 January, or the week holding the majority of its days in the new year. Counting forward from there, week 27 is the 27th Monday-to-Sunday block of 2026, which lands on June 29. All seven dates sit inside 2026, so the ISO year and the calendar year agree for this week.
When is week 27 in other years?
| Year | Monday | Sunday | Weeks in year |
|---|---|---|---|
| 2026 | June 29 | July 5 | 53 |
| 2027 | July 5 | July 11 | 52 |
| 2028 | July 3 | July 9 | 52 |
| 2029 | July 2 | July 8 | 52 |
| 2030 | July 1 | July 7 | 52 |
Week 27 shifts by a day or two each year because a year is 52 weeks plus one or two days, so the Monday that opens it moves from June 29 in 2026 to July 5 in 2027.
How far away is week 27?
Today is Wednesday, September 23, 2026, which sits in ISO week 39 of 2026. Week 27 of 2026 closed 80 days ago. The same week number in the following year is listed in the table above.
Questions
- What dates are in week 27 of 2026?
- Monday June 29, 2026 through Sunday July 5, 2026.
- What week is it now?
- ISO week 39 of 2026. Today is Wednesday, September 23, 2026.
- How many weeks does 2026 have?
- 53. The 2026 week count page explains the rule.
- Do ISO weeks start on Monday or Sunday?
- Monday. A Sunday-first week is a different convention and can give a different week number for the same date.
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