Week number 49 (Week 49) 2021

Updated on by Michael Mühl

Week number 49 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 49/2021

Monday, December  6, 2021

Sunday, December 12, 2021

ISO-Notation: 2021‑W49

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 49 applies:

Week number 49/2021

Sunday, November 28, 2021

Saturday, December  4, 2021

The date of the calendar week 49 (Week 49) in the past and coming years

The following table provides an overview of the calendar week 49 for each year. The beginning of the calendar week 49 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 49, 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 49
Year Calculation
method
Start of week 49End of week 49ISO name
2011 European Monday, December  5, 2011Sunday, December 11, 20112011‑W49
American Sunday, November 27, 2011Saturday, December  3, 2011-
2012 European Monday, December  3, 2012Sunday, December  9, 20122012‑W49
American Sunday, December  2, 2012Saturday, December  8, 2012-
2013 European Monday, December  2, 2013Sunday, December  8, 20132013‑W49
American Sunday, December  1, 2013Saturday, December  7, 2013-
2014 European Monday, December  1, 2014Sunday, December  7, 20142014‑W49
American Sunday, November 30, 2014Saturday, December  6, 2014-
2015 European Monday, November 30, 2015Sunday, December  6, 20152015‑W49
American Sunday, November 29, 2015Saturday, December  5, 2015-
2016 European Monday, December  5, 2016Sunday, December 11, 20162016‑W49
American Sunday, November 27, 2016Saturday, December  3, 2016-
2017 European Monday, December  4, 2017Sunday, December 10, 20172017‑W49
American Sunday, December  3, 2017Saturday, December  9, 2017-
2018 European Monday, December  3, 2018Sunday, December  9, 20182018‑W49
American Sunday, December  2, 2018Saturday, December  8, 2018-
2019 European Monday, December  2, 2019Sunday, December  8, 20192019‑W49
American Sunday, December  1, 2019Saturday, December  7, 2019-
2020 European Monday, November 30, 2020Sunday, December  6, 20202020‑W49
American Sunday, November 29, 2020Saturday, December  5, 2020-
2021 European Monday, December  6, 2021Sunday, December 12, 20212021‑W49
American Sunday, November 28, 2021Saturday, December  4, 2021-
2022 European Monday, December  5, 2022Sunday, December 11, 20222022‑W49
American Sunday, November 27, 2022Saturday, December  3, 2022-
2023 European Monday, December  4, 2023Sunday, December 10, 20232023‑W49
American Sunday, December  3, 2023Saturday, December  9, 2023-
2024 European Monday, December  2, 2024Sunday, December  8, 20242024‑W49
American Sunday, December  1, 2024Saturday, December  7, 2024-
2025 European Monday, December  1, 2025Sunday, December  7, 20252025‑W49
American Sunday, November 30, 2025Saturday, December  6, 2025-
2026 European Monday, November 30, 2026Sunday, December  6, 20262026‑W49
American Sunday, November 29, 2026Saturday, December  5, 2026-
2027 European Monday, December  6, 2027Sunday, December 12, 20272027‑W49
American Sunday, November 28, 2027Saturday, December  4, 2027-
2028 European Monday, December  4, 2028Sunday, December 10, 20282028‑W49
American Sunday, November 26, 2028Saturday, December  2, 2028-
2029 European Monday, December  3, 2029Sunday, December  9, 20292029‑W49
American Sunday, December  2, 2029Saturday, December  8, 2029-
2030 European Monday, December  2, 2030Sunday, December  8, 20302030‑W49
American Sunday, December  1, 2030Saturday, December  7, 2030-
2031 European Monday, December  1, 2031Sunday, December  7, 20312031‑W49
American Sunday, November 30, 2031Saturday, December  6, 2031-

Determine week 49 or other calendar weeks in the calculator

In the calendar week calculator, the entry for the European ISO calendar week 49 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