Week number 45 (Week 45) 2021

Updated on by Michael Mühl

Week number 45 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 45/2021

Monday, November  8, 2021

Sunday, November 14, 2021

ISO-Notation: 2021‑W45

American calculation

In the USA, Canada and most Latin American countries, Australia as well as in Japan, Israel, South Korea and others, the following definition of week 45 applies:

Week number 45/2021

Sunday, October 31, 2021

Saturday, November  6, 2021

The date of the calendar week 45 (Week 45) in the past and coming years

The following table provides an overview of the calendar week 45 for each year. The beginning of the calendar week 45 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 45, 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 e.g. Japan.

Week number 45
Year Calculation
method
Start of week 45End of week 45ISO name
2011 European Monday, November  7, 2011Sunday, November 13, 20112011‑W45
American Sunday, October 30, 2011Saturday, November  5, 2011-
2012 European Monday, November  5, 2012Sunday, November 11, 20122012‑W45
American Sunday, November  4, 2012Saturday, November 10, 2012-
2013 European Monday, November  4, 2013Sunday, November 10, 20132013‑W45
American Sunday, November  3, 2013Saturday, November  9, 2013-
2014 European Monday, November  3, 2014Sunday, November  9, 20142014‑W45
American Sunday, November  2, 2014Saturday, November  8, 2014-
2015 European Monday, November  2, 2015Sunday, November  8, 20152015‑W45
American Sunday, November  1, 2015Saturday, November  7, 2015-
2016 European Monday, November  7, 2016Sunday, November 13, 20162016‑W45
American Sunday, October 30, 2016Saturday, November  5, 2016-
2017 European Monday, November  6, 2017Sunday, November 12, 20172017‑W45
American Sunday, November  5, 2017Saturday, November 11, 2017-
2018 European Monday, November  5, 2018Sunday, November 11, 20182018‑W45
American Sunday, November  4, 2018Saturday, November 10, 2018-
2019 European Monday, November  4, 2019Sunday, November 10, 20192019‑W45
American Sunday, November  3, 2019Saturday, November  9, 2019-
2020 European Monday, November  2, 2020Sunday, November  8, 20202020‑W45
American Sunday, November  1, 2020Saturday, November  7, 2020-
2021 European Monday, November  8, 2021Sunday, November 14, 20212021‑W45
American Sunday, October 31, 2021Saturday, November  6, 2021-
2022 European Monday, November  7, 2022Sunday, November 13, 20222022‑W45
American Sunday, October 30, 2022Saturday, November  5, 2022-
2023 European Monday, November  6, 2023Sunday, November 12, 20232023‑W45
American Sunday, November  5, 2023Saturday, November 11, 2023-
2024 European Monday, November  4, 2024Sunday, November 10, 20242024‑W45
American Sunday, November  3, 2024Saturday, November  9, 2024-
2025 European Monday, November  3, 2025Sunday, November  9, 20252025‑W45
American Sunday, November  2, 2025Saturday, November  8, 2025-
2026 European Monday, November  2, 2026Sunday, November  8, 20262026‑W45
American Sunday, November  1, 2026Saturday, November  7, 2026-
2027 European Monday, November  8, 2027Sunday, November 14, 20272027‑W45
American Sunday, October 31, 2027Saturday, November  6, 2027-
2028 European Monday, November  6, 2028Sunday, November 12, 20282028‑W45
American Sunday, October 29, 2028Saturday, November  4, 2028-
2029 European Monday, November  5, 2029Sunday, November 11, 20292029‑W45
American Sunday, November  4, 2029Saturday, November 10, 2029-
2030 European Monday, November  4, 2030Sunday, November 10, 20302030‑W45
American Sunday, November  3, 2030Saturday, November  9, 2030-
2031 European Monday, November  3, 2031Sunday, November  9, 20312031‑W45
American Sunday, November  2, 2031Saturday, November  8, 2031-

Determine week 45 or other calendar weeks in the calculator

In the calendar week calculator, the entry for the European ISO calendar week 45 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 19, 2021

The pages of the "Week Numbers" category were last editorially reviewed by Michael Mühl on June 19, 2021. They all correspond to the current status.

Previous changes on June 25, 2020