Week Number 38 of the next year 2026 is defined as follows.
European and Asian calculation
Mainly in Europe and Asia, the international ISO 8601 definition is used for counting calendar weeks:
American calculation
In the USA, Canada and most Latin American countries, Australia, Japan, Israel, South Korea and others, the following definition of Week 38 applies:
The date of the calendar Week 38 and other years
The following table provides an overview of the calendar Week 38 for each year. The beginning of the calendar Week 38 and its end are shown according to the two most commonly used definitions of calendar weeks worldwide. The first is the international ISO standard for Week 38, referred to here as the "European" calculation method. It is mainly used in Europe and Asia. On the other hand, the "American" calculation method for weeks is listed, which is mainly used in North and South America, Australia and Japan.
| Week Number 38 | ||||
|---|---|---|---|---|
| Year |
Calculation Method | Start of Week 38 | End of Week 38 | ISO Name |
| 2023 | European | Monday, September 18, 2023 | Sunday, September 24, 2023 | 2023‑W38 |
| American | Sunday, September 17, 2023 | Saturday, September 23, 2023 | - | |
| 2024 | European | Monday, September 16, 2024 | Sunday, September 22, 2024 | 2024‑W38 |
| American | Sunday, September 15, 2024 | Saturday, September 21, 2024 | - | |
| 2025 | European | Monday, September 15, 2025 | Sunday, September 21, 2025 | 2025‑W38 |
| American | Sunday, September 14, 2025 | Saturday, September 20, 2025 | - | |
| 2026 | European | Monday, September 14, 2026 | Sunday, September 20, 2026 | 2026‑W38 |
| American | Sunday, September 13, 2026 | Saturday, September 19, 2026 | - | |
| 2027 | European | Monday, September 20, 2027 | Sunday, September 26, 2027 | 2027‑W38 |
| American | Sunday, September 12, 2027 | Saturday, September 18, 2027 | - | |
| 2028 | European | Monday, September 18, 2028 | Sunday, September 24, 2028 | 2028‑W38 |
| American | Sunday, September 10, 2028 | Saturday, September 16, 2028 | - | |
| 2029 | European | Monday, September 17, 2029 | Sunday, September 23, 2029 | 2029‑W38 |
| American | Sunday, September 16, 2029 | Saturday, September 22, 2029 | - | |
Determine Week 38 or other calendar weeks in the calculator
In the Calendar Week Calculator, the entry for the European ISO calendar Week 38 is preset. Of course, you can also enter other values here to determine the date of the beginning of the week or the end of the week.
Calendar Week Calculator for other years
For calendar years further back or in the future, you will find the beginning and end of the corresponding calendar week in the Calendar Week Calculator.
Source information
As source for the information in the 'Week Numbers' category, we have used in particular:
Last update
This page of the 'Week Numbers' category was last edited or reviewed by Michael Mühl. It corresponds to the current status.
Changes in this category "Week Numbers"
- Weekly update of the page for the current calendar week.
- Publication of the Week Number Calculator
- Editorial revision of this page