Week Number 37 (Week 37) 2021

Updated on by Michael Mühl

Week Number 37 of the current year 2021 is defined as follows:

European and Asian calculation

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

Week Number 37/2021

Monday, September 13, 2021

Sunday, September 19, 2021

ISO: 2021‑W37

American calculation

In the USA, Canada and most Latin American countries, Australia, Japan, Israel, South Korea and others, the following definition of Week 37 applies:

Week Number 37/2021

Sunday, September 5, 2021

Saturday, September 11, 2021

The date of the calendar Week 37 (Week 37) in the past and coming years

The following table provides an overview of the calendar Week 37 for each year. The beginning of the calendar Week 37 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 37, 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 37
Year Calculation
Method
Start of Week 37End of Week 37ISO Name
2011 European Monday, September 12, 2011Sunday, September 18, 20112011‑W37
American Sunday, September 4, 2011Saturday, September 10, 2011-
2012 European Monday, September 10, 2012Sunday, September 16, 20122012‑W37
American Sunday, September 9, 2012Saturday, September 15, 2012-
2013 European Monday, September 9, 2013Sunday, September 15, 20132013‑W37
American Sunday, September 8, 2013Saturday, September 14, 2013-
2014 European Monday, September 8, 2014Sunday, September 14, 20142014‑W37
American Sunday, September 7, 2014Saturday, September 13, 2014-
2015 European Monday, September 7, 2015Sunday, September 13, 20152015‑W37
American Sunday, September 6, 2015Saturday, September 12, 2015-
2016 European Monday, September 12, 2016Sunday, September 18, 20162016‑W37
American Sunday, September 4, 2016Saturday, September 10, 2016-
2017 European Monday, September 11, 2017Sunday, September 17, 20172017‑W37
American Sunday, September 10, 2017Saturday, September 16, 2017-
2018 European Monday, September 10, 2018Sunday, September 16, 20182018‑W37
American Sunday, September 9, 2018Saturday, September 15, 2018-
2019 European Monday, September 9, 2019Sunday, September 15, 20192019‑W37
American Sunday, September 8, 2019Saturday, September 14, 2019-
2020 European Monday, September 7, 2020Sunday, September 13, 20202020‑W37
American Sunday, September 6, 2020Saturday, September 12, 2020-
2021 European Monday, September 13, 2021Sunday, September 19, 20212021‑W37
American Sunday, September 5, 2021Saturday, September 11, 2021-
2022 European Monday, September 12, 2022Sunday, September 18, 20222022‑W37
American Sunday, September 4, 2022Saturday, September 10, 2022-
2023 European Monday, September 11, 2023Sunday, September 17, 20232023‑W37
American Sunday, September 10, 2023Saturday, September 16, 2023-
2024 European Monday, September 9, 2024Sunday, September 15, 20242024‑W37
American Sunday, September 8, 2024Saturday, September 14, 2024-
2025 European Monday, September 8, 2025Sunday, September 14, 20252025‑W37
American Sunday, September 7, 2025Saturday, September 13, 2025-
2026 European Monday, September 7, 2026Sunday, September 13, 20262026‑W37
American Sunday, September 6, 2026Saturday, September 12, 2026-
2027 European Monday, September 13, 2027Sunday, September 19, 20272027‑W37
American Sunday, September 5, 2027Saturday, September 11, 2027-
2028 European Monday, September 11, 2028Sunday, September 17, 20282028‑W37
American Sunday, September 3, 2028Saturday, September 9, 2028-
2029 European Monday, September 10, 2029Sunday, September 16, 20292029‑W37
American Sunday, September 9, 2029Saturday, September 15, 2029-
2030 European Monday, September 9, 2030Sunday, September 15, 20302030‑W37
American Sunday, September 8, 2030Saturday, September 14, 2030-
2031 European Monday, September 8, 2031Sunday, September 14, 20312031‑W37
American Sunday, September 7, 2031Saturday, September 13, 2031-

Determine Week 37 or other calendar weeks in the calculator

In the Calendar Week Calculator, the entry for the European ISO calendar Week 37 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 September 27, 2021

The pages of the "Week Numbers" category were last editorially reviewed by Michael Mühl on September 27, 2021. They all correspond to the current status.

Previous changes on June 25, 2020