Week 38 of 2027 runs September 20, 2027 to September 26, 2027.
Week 38 starts on Monday, September 20, 2027 and ends on Sunday, September 26, 2027. It's the 263rd day of the year, sits in Q3, and falls in September. By the end of this week, 269 of 365 days are gone, putting 2027 at 73.7%.
There are no public holidays this week, so all 5 weekdays are working days. Need a different week? Browse the full 2027 week calendar, or jump to this week's number.
Week 38 at a glance
The 7 days of week 38
Every date in week 38 of 2027, Monday through Sunday, with day-of-year numbers and events.
| Day | Date | Day no. | Type | Events |
|---|---|---|---|---|
| Monday | Day 263 | Weekday | ||
| Tuesday | Day 264 | Weekday | ||
| Wednesday | Day 265 | Weekday | ||
| Thursday | Day 266 | Weekday | Autumn Equinox | |
| Friday | Day 267 | Weekday | ||
| Saturday | Day 268 | Weekend | ||
| Sunday | Day 269 | Weekend |
What week 38 of 2027 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 38 is one piece of that system.
In 2027, week 38 covers Sep 20 – Sep 26, 2027. That's September, deep in Q3. The same week number shifts by a day or two each year, so week 38 in 2028 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 38 of 2027
🇺🇸 United States
🇬🇧 United Kingdom
🇨🇦 Canada
🇦🇺 Australia
Week 38 across years
The same ISO week number lands on different dates each year. Here's how week 38 shifts.
Week 38 of 2027: questions and answers
What days are in week 38 of 2027?
Week 38 of 2027 runs from September 20, 2027 (Monday) through September 26, 2027 (Sunday). It spans September.
What month is week 38 in 2027?
Week 38 of 2027 falls entirely in September 2027.
How many working days are in week 38 of 2027?
Week 38 of 2027 has 5 working days.
What week is Autumn Equinox in 2027?
Autumn Equinox falls in ISO week 38 of 2027 (Sep 20 – Sep 26, 2027).
What quarter is week 38 of 2027 in?
Week 38 of 2027 is in Q3 (2027). The week starts on day 263 of 365.
What is ISO week 38?
ISO week 38 is defined by the ISO 8601 international standard. It begins on Monday, September 20, 2027, and ends on Sunday, September 26, 2027. It is week 73% through the ISO year 2027.