Week 23 of 2026 runs June 1 to June 7
ISO week 23 of 2026 begins on Monday, June 1, 2026 and ends on Sunday, June 7, 2026. It has already passed; the current week is 39. The week covers June only.
What dates are in week 23?
| Weekday | Date | Day of year | Notes |
|---|---|---|---|
| Monday | June 1, 2026 | 152 | |
| Tuesday | June 2, 2026 | 153 | |
| Wednesday | June 3, 2026 | 154 | |
| Thursday | June 4, 2026 | 155 | |
| Friday | June 5, 2026 | 156 | |
| Saturday | June 6, 2026 | 157 | |
| Sunday | June 7, 2026 | 158 |
No holiday or widely marked observance falls inside week 23 of 2026. 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 23 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 23 is the 23rd Monday-to-Sunday block of 2026, which lands on June 1. All seven dates sit inside 2026, so the ISO year and the calendar year agree for this week.
When is week 23 in other years?
| Year | Monday | Sunday | Weeks in year |
|---|---|---|---|
| 2026 | June 1 | June 7 | 53 |
| 2027 | June 7 | June 13 | 52 |
| 2028 | June 5 | June 11 | 52 |
| 2029 | June 4 | June 10 | 52 |
| 2030 | June 3 | June 9 | 52 |
Week 23 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 1 in 2026 to June 7 in 2027.
How far away is week 23?
Today is Wednesday, September 23, 2026, which sits in ISO week 39 of 2026. Week 23 of 2026 closed 108 days ago. The same week number in the following year is listed in the table above.
Questions
- What dates are in week 23 of 2026?
- Monday June 1, 2026 through Sunday June 7, 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.
Nearby weeks
Jump to a week
All 53 weeks · Weeks in 2026 · Day of the year · Weeks until any date · Date calculator