Week 18 2023

Week 18 2023
Week Number 18 in 2023

Week Numbers ﹣ Week 18 2023

Week Number 18 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 1, 2023 – Sunday, May 7, 2023

ISO: 2023‑W18
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 18 applies:

Week Number 18/2023

Sunday, April 30, 2023

Saturday, May 6, 2023


The date of the calendar Week  18 and other years

The following table provides an overview of the calendar Week 18 for each year. The beginning of the calendar Week 18 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 18, 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 18
Year Calculation
Start of Week 18End of Week 18ISO Name
2020 European Monday, April 27, 2020Sunday, May 3, 20202020‑W18
American Sunday, April 26, 2020Saturday, May 2, 2020-
2021 European Monday, May 3, 2021Sunday, May 9, 20212021‑W18
American Sunday, April 25, 2021Saturday, May 1, 2021-
2022 European Monday, May 2, 2022Sunday, May 8, 20222022‑W18
American Sunday, April 24, 2022Saturday, April 30, 2022-
2023 European Monday, May 1, 2023Sunday, May 7, 20232023‑W18
American Sunday, April 30, 2023Saturday, May 6, 2023-
2024 European Monday, April 29, 2024Sunday, May 5, 20242024‑W18
American Sunday, April 28, 2024Saturday, May 4, 2024-
2025 European Monday, April 28, 2025Sunday, May 4, 20252025‑W18
American Sunday, April 27, 2025Saturday, May 3, 2025-
2026 European Monday, April 27, 2026Sunday, May 3, 20262026‑W18
American Sunday, April 26, 2026Saturday, May 2, 2026-

Determine Week 18 or other calendar weeks in the calculator

In the Calendar Week Calculator, the entry for the European ISO calendar Week 18 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 March 20, 2023

The pages of the 'Week Numbers' category were last editorially reviewed by Michael Mühl on March 20, 2023. They all correspond to the current status.

Previous changes on June 25, 2021