Week 36 of 2025 runs September 1, 2025 to September 7, 2025.
Week 36 starts on Monday, September 1, 2025 and ends on Sunday, September 7, 2025. It's the 244th day of the year, sits in Q3, and falls in September. By the end of this week, 250 of 365 days are gone, putting 2025 at 68.5%.
This week includes Labor Day, so it has 4 working days instead of the usual 5. Need a different week? Browse the full 2025 week calendar, or jump to this week's number.
Week 36 at a glance
The 7 days of week 36
Every date in week 36 of 2025, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 244 | Weekday | Labor Day | |
| Tuesday | Day 245 | Weekday | ||
| Wednesday | Day 246 | Weekday | ||
| Thursday | Day 247 | Weekday | ||
| Friday | Day 248 | Weekday | ||
| Saturday | Day 249 | Weekend | ||
| Sunday | Day 250 | Weekend |
What week 36 of 2025 means
ISO 8601 numbers weeks so every week starts on Monday and ends on Sunday. Week 1 is the one holding the year's first Thursday, which is why early January can land in week 52 or 53 of the previous year. Week 36 is one piece of that system.
In 2025, week 36 covers Sep 1 – Sep 7, 2025. That's September, deep in Q3. The same week number shifts by a day or two each year, so week 36 in 2026 won't share these exact dates. The table below shows how it moves.
Want to check a specific date instead of a week number? The week calculator converts any date to its ISO week. Curious how many weeks a year holds? The weeks in a year guide explains 52 versus 53. And the ISO week number page covers the standard end to end.
Holidays in week 36 of 2025
🇺🇸 United States
🇨🇦 Canada
Labour Day
FederalWeek 36 across years
The same ISO week number lands on different dates each year. Here's how week 36 shifts.
Week 36 of 2025: questions and answers
What days are in week 36 of 2025?
Week 36 of 2025 runs from September 1, 2025 (Monday) through September 7, 2025 (Sunday). It spans September.
What month is week 36 in 2025?
Week 36 of 2025 falls entirely in September 2025.
How many working days are in week 36 of 2025?
Week 36 of 2025 has 4 working days — reduced from 5 due to Labor Day falling on a weekday.
What week is Labor Day in 2025?
Labor Day falls in ISO week 36 of 2025 (Sep 1 – Sep 7, 2025).
What quarter is week 36 of 2025 in?
Week 36 of 2025 is in Q3 (2025). The week starts on day 244 of 365.
What is ISO week 36?
ISO week 36 is defined by the ISO 8601 international standard. It begins on Monday, September 1, 2025, and ends on Sunday, September 7, 2025. It is week 69% through the ISO year 2025.