Week 21 2023

Week 21 2023
Week Number 21 in 2023

Week Numbers ﹣ Week 21 2023

Week Number 21 of the current year 2023 is defined as follows.

European and Asian calculation

Mainly in Europe and Asia, the international ISO 8601 definition is used for counting calendar weeks:

Monday, May 22, 2023 – Sunday, May 28, 2023

ISO: 2023‑W21
Week Number 2023

American calculation

In the USA, Canada and most Latin American countries, Australia, Japan, Israel, South Korea and others, the following definition of Week 21 applies:

Week Number 21/2023

Sunday, May 21, 2023

Saturday, May 27, 2023


The date of the calendar Week  21 and other years

The following table provides an overview of the calendar Week 21 for each year. The beginning of the calendar Week 21 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 21, 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 21
Year Calculation
Start of Week 21End of Week 21ISO Name
2020 European Monday, May 18, 2020Sunday, May 24, 20202020‑W21
American Sunday, May 17, 2020Saturday, May 23, 2020-
2021 European Monday, May 24, 2021Sunday, May 30, 20212021‑W21
American Sunday, May 16, 2021Saturday, May 22, 2021-
2022 European Monday, May 23, 2022Sunday, May 29, 20222022‑W21
American Sunday, May 15, 2022Saturday, May 21, 2022-
2023 European Monday, May 22, 2023Sunday, May 28, 20232023‑W21
American Sunday, May 21, 2023Saturday, May 27, 2023-
2024 European Monday, May 20, 2024Sunday, May 26, 20242024‑W21
American Sunday, May 19, 2024Saturday, May 25, 2024-
2025 European Monday, May 19, 2025Sunday, May 25, 20252025‑W21
American Sunday, May 18, 2025Saturday, May 24, 2025-
2026 European Monday, May 18, 2026Sunday, May 24, 20262026‑W21
American Sunday, May 17, 2026Saturday, May 23, 2026-

Determine Week 21 or other calendar weeks in the calculator

In the Calendar Week Calculator, the entry for the European ISO calendar Week 21 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 on June 1, 2023

The pages of the 'Week Numbers' category were last editorially reviewed by Michael Mühl on June 1, 2023. They all correspond to the current status.

Previous changes on June 25, 2021