Week Number 20 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 20 applies:
The date of the calendar Week 20 and other years
The following table provides an overview of the calendar Week 20 for each year. The beginning of the calendar Week 20 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 20, 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 20 | ||||
|---|---|---|---|---|
| Year |
Calculation Method | Start of Week 20 | End of Week 20 | ISO Name |
| 2023 | European | Monday, May 15, 2023 | Sunday, May 21, 2023 | 2023‑W20 |
| American | Sunday, May 14, 2023 | Saturday, May 20, 2023 | - | |
| 2024 | European | Monday, May 13, 2024 | Sunday, May 19, 2024 | 2024‑W20 |
| American | Sunday, May 12, 2024 | Saturday, May 18, 2024 | - | |
| 2025 | European | Monday, May 12, 2025 | Sunday, May 18, 2025 | 2025‑W20 |
| American | Sunday, May 11, 2025 | Saturday, May 17, 2025 | - | |
| 2026 | European | Monday, May 11, 2026 | Sunday, May 17, 2026 | 2026‑W20 |
| American | Sunday, May 10, 2026 | Saturday, May 16, 2026 | - | |
| 2027 | European | Monday, May 17, 2027 | Sunday, May 23, 2027 | 2027‑W20 |
| American | Sunday, May 9, 2027 | Saturday, May 15, 2027 | - | |
| 2028 | European | Monday, May 15, 2028 | Sunday, May 21, 2028 | 2028‑W20 |
| American | Sunday, May 7, 2028 | Saturday, May 13, 2028 | - | |
| 2029 | European | Monday, May 14, 2029 | Sunday, May 20, 2029 | 2029‑W20 |
| American | Sunday, May 13, 2029 | Saturday, May 19, 2029 | - | |
Determine Week 20 or other calendar weeks in the calculator
In the Calendar Week Calculator, the entry for the European ISO calendar Week 20 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