Week Number 42 (Week 42) 2021

Updated on by Michael Mühl

Week Number 42 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 42/2021

Monday, October 18, 2021

Sunday, October 24, 2021

ISO: 2021‑W42

American calculation

In the USA, Canada and most Latin American countries, Australia, Japan, Israel, South Korea and others, the following definition of Week 42 applies:

Week Number 42/2021

Sunday, October 10, 2021

Saturday, October 16, 2021

The date of the calendar Week 42 (Week 42) in the past and coming years

The following table provides an overview of the calendar Week 42 for each year. The beginning of the calendar Week 42 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 42, 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 42
Year Calculation
Method
Start of Week 42End of Week 42ISO Name
2011 European Monday, October 17, 2011Sunday, October 23, 20112011‑W42
American Sunday, October 9, 2011Saturday, October 15, 2011-
2012 European Monday, October 15, 2012Sunday, October 21, 20122012‑W42
American Sunday, October 14, 2012Saturday, October 20, 2012-
2013 European Monday, October 14, 2013Sunday, October 20, 20132013‑W42
American Sunday, October 13, 2013Saturday, October 19, 2013-
2014 European Monday, October 13, 2014Sunday, October 19, 20142014‑W42
American Sunday, October 12, 2014Saturday, October 18, 2014-
2015 European Monday, October 12, 2015Sunday, October 18, 20152015‑W42
American Sunday, October 11, 2015Saturday, October 17, 2015-
2016 European Monday, October 17, 2016Sunday, October 23, 20162016‑W42
American Sunday, October 9, 2016Saturday, October 15, 2016-
2017 European Monday, October 16, 2017Sunday, October 22, 20172017‑W42
American Sunday, October 15, 2017Saturday, October 21, 2017-
2018 European Monday, October 15, 2018Sunday, October 21, 20182018‑W42
American Sunday, October 14, 2018Saturday, October 20, 2018-
2019 European Monday, October 14, 2019Sunday, October 20, 20192019‑W42
American Sunday, October 13, 2019Saturday, October 19, 2019-
2020 European Monday, October 12, 2020Sunday, October 18, 20202020‑W42
American Sunday, October 11, 2020Saturday, October 17, 2020-
2021 European Monday, October 18, 2021Sunday, October 24, 20212021‑W42
American Sunday, October 10, 2021Saturday, October 16, 2021-
2022 European Monday, October 17, 2022Sunday, October 23, 20222022‑W42
American Sunday, October 9, 2022Saturday, October 15, 2022-
2023 European Monday, October 16, 2023Sunday, October 22, 20232023‑W42
American Sunday, October 15, 2023Saturday, October 21, 2023-
2024 European Monday, October 14, 2024Sunday, October 20, 20242024‑W42
American Sunday, October 13, 2024Saturday, October 19, 2024-
2025 European Monday, October 13, 2025Sunday, October 19, 20252025‑W42
American Sunday, October 12, 2025Saturday, October 18, 2025-
2026 European Monday, October 12, 2026Sunday, October 18, 20262026‑W42
American Sunday, October 11, 2026Saturday, October 17, 2026-
2027 European Monday, October 18, 2027Sunday, October 24, 20272027‑W42
American Sunday, October 10, 2027Saturday, October 16, 2027-
2028 European Monday, October 16, 2028Sunday, October 22, 20282028‑W42
American Sunday, October 8, 2028Saturday, October 14, 2028-
2029 European Monday, October 15, 2029Sunday, October 21, 20292029‑W42
American Sunday, October 14, 2029Saturday, October 20, 2029-
2030 European Monday, October 14, 2030Sunday, October 20, 20302030‑W42
American Sunday, October 13, 2030Saturday, October 19, 2030-
2031 European Monday, October 13, 2031Sunday, October 19, 20312031‑W42
American Sunday, October 12, 2031Saturday, October 18, 2031-

Determine Week 42 or other calendar weeks in the calculator

In the Calendar Week Calculator, the entry for the European ISO calendar Week 42 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