Week Numbers for 2021
This page lists all weeks in 2021. There are 52 weeks in 2021.
All weeks are starting on Monday and ending on Sunday.
Please note that there are multiple systems for week numbering, this is the ISO week date standard (ISO-8601), other systems use weeks starting on Sunday (US) or Saturday (Islamic).
The current week (week 09) is highlighted.
Find more info on our main week number page.
« week numbers for 2020 | week numbers for 2022 »
| Week number | From Date | To Date |
|---|---|---|
| Week 53, 2020 | Dec. 28, 2020 | Jan. 3, 2021 |
| Week 01 | Jan. 4, 2021 | Jan. 10, 2021 |
| Week 02 | Jan. 11, 2021 | Jan. 17, 2021 |
| Week 03 | Jan. 18, 2021 | Jan. 24, 2021 |
| Week 04 | Jan. 25, 2021 | Jan. 31, 2021 |
| Week 05 | Feb. 1, 2021 | Feb. 7, 2021 |
| Week 06 | Feb. 8, 2021 | Feb. 14, 2021 |
| Week 07 | Feb. 15, 2021 | Feb. 21, 2021 |
| Week 08 | Feb. 22, 2021 | Feb. 28, 2021 |
| Week 09 | Mar. 1, 2021 | Mar. 7, 2021 |
| Week 10 | Mar. 8, 2021 | Mar. 14, 2021 |
| Week 11 | Mar. 15, 2021 | Mar. 21, 2021 |
| Week 12 | Mar. 22, 2021 | Mar. 28, 2021 |
| Week 13 | Mar. 29, 2021 | Apr. 4, 2021 |
| Week 14 | Apr. 5, 2021 | Apr. 11, 2021 |
| Week 15 | Apr. 12, 2021 | Apr. 18, 2021 |
| Week 16 | Apr. 19, 2021 | Apr. 25, 2021 |
| Week 17 | Apr. 26, 2021 | May 2, 2021 |
| Week 18 | May 3, 2021 | May 9, 2021 |
| Week 19 | May 10, 2021 | May 16, 2021 |
| Week 20 | May 17, 2021 | May 23, 2021 |
| Week 21 | May 24, 2021 | May 30, 2021 |
| Week 22 | May 31, 2021 | June 6, 2021 |
| Week 23 | June 7, 2021 | June 13, 2021 |
| Week 24 | June 14, 2021 | June 20, 2021 |
| Week 25 | June 21, 2021 | June 27, 2021 |
| Week 26 | June 28, 2021 | July 4, 2021 |
| Week 27 | July 5, 2021 | July 11, 2021 |
| Week 28 | July 12, 2021 | July 18, 2021 |
| Week 29 | July 19, 2021 | July 25, 2021 |
| Week 30 | July 26, 2021 | Aug. 1, 2021 |
| Week 31 | Aug. 2, 2021 | Aug. 8, 2021 |
| Week 32 | Aug. 9, 2021 | Aug. 15, 2021 |
| Week 33 | Aug. 16, 2021 | Aug. 22, 2021 |
| Week 34 | Aug. 23, 2021 | Aug. 29, 2021 |
| Week 35 | Aug. 30, 2021 | Sep. 5, 2021 |
| Week 36 | Sep. 6, 2021 | Sep. 12, 2021 |
| Week 37 | Sep. 13, 2021 | Sep. 19, 2021 |
| Week 38 | Sep. 20, 2021 | Sep. 26, 2021 |
| Week 39 | Sep. 27, 2021 | Oct. 3, 2021 |
| Week 40 | Oct. 4, 2021 | Oct. 10, 2021 |
| Week 41 | Oct. 11, 2021 | Oct. 17, 2021 |
| Week 42 | Oct. 18, 2021 | Oct. 24, 2021 |
| Week 43 | Oct. 25, 2021 | Oct. 31, 2021 |
| Week 44 | Nov. 1, 2021 | Nov. 7, 2021 |
| Week 45 | Nov. 8, 2021 | Nov. 14, 2021 |
| Week 46 | Nov. 15, 2021 | Nov. 21, 2021 |
| Week 47 | Nov. 22, 2021 | Nov. 28, 2021 |
| Week 48 | Nov. 29, 2021 | Dec. 5, 2021 |
| Week 49 | Dec. 6, 2021 | Dec. 12, 2021 |
| Week 50 | Dec. 13, 2021 | Dec. 19, 2021 |
| Week 51 | Dec. 20, 2021 | Dec. 26, 2021 |
| Week 52 | Dec. 27, 2021 | Jan. 2, 2022 |
| Week 01, 2022 | Jan. 3, 2022 | Jan. 9, 2022 |
« week numbers for 2020 | week numbers for 2022 »
Other years: 1920-1989 | 1990 | 1991 | 1992 | 1993 | 1994 | 1995 | 1996 | 1997 | 1998 | 1999 | 2000 | 2001 | 2002 | 2003 | 2004 | 2005 | 2006 | 2007 | 2008 | 2009 | 2010 | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 | 2024 | 2025 | 2026 | 2027 | 2028 | 2029 | 2030 | 2031 | 2032 | 2033 | 2034 | 2035 | 2036 | 2037 | 2038 | 2039 | 2040
Also see: Day numbers for 2021
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