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Online Calculators > Time Calculators
How Many Weeks in 2021?
How Many Weeks in 2021? - There are 52 weeks in 2021. We use the ISO week date standard to list all 52 weeks in 2021.
On 2021, the first week starts on Monday January 04, 2021 and last week ends on Sunday January 02, 2022.
Note: All weeks are starting from Monday and ending on Sunday with the ISO week date standard.
2021 Week Numbers
| Week Number |
From Date |
To Date |
| 1 |
January 04, 2021 |
January 10, 2021 |
| 2 |
January 11, 2021 |
January 17, 2021 |
| 3 |
January 18, 2021 |
January 24, 2021 |
| 4 |
January 25, 2021 |
January 31, 2021 |
| 5 |
February 01, 2021 |
February 07, 2021 |
| 6 |
February 08, 2021 |
February 14, 2021 |
| 7 |
February 15, 2021 |
February 21, 2021 |
| 8 |
February 22, 2021 |
February 28, 2021 |
| 9 |
March 01, 2021 |
March 07, 2021 |
| 10 |
March 08, 2021 |
March 14, 2021 |
| 11 |
March 15, 2021 |
March 21, 2021 |
| 12 |
March 22, 2021 |
March 28, 2021 |
| 13 |
March 29, 2021 |
April 04, 2021 |
| 14 |
April 05, 2021 |
April 11, 2021 |
| 15 |
April 12, 2021 |
April 18, 2021 |
| 16 |
April 19, 2021 |
April 25, 2021 |
| 17 |
April 26, 2021 |
May 02, 2021 |
| 18 |
May 03, 2021 |
May 09, 2021 |
| 19 |
May 10, 2021 |
May 16, 2021 |
| 20 |
May 17, 2021 |
May 23, 2021 |
| 21 |
May 24, 2021 |
May 30, 2021 |
| 22 |
May 31, 2021 |
June 06, 2021 |
| 23 |
June 07, 2021 |
June 13, 2021 |
| 24 |
June 14, 2021 |
June 20, 2021 |
| 25 |
June 21, 2021 |
June 27, 2021 |
| 26 |
June 28, 2021 |
July 04, 2021 |
| 27 |
July 05, 2021 |
July 11, 2021 |
| 28 |
July 12, 2021 |
July 18, 2021 |
| 29 |
July 19, 2021 |
July 25, 2021 |
| 30 |
July 26, 2021 |
August 01, 2021 |
| 31 |
August 02, 2021 |
August 08, 2021 |
| 32 |
August 09, 2021 |
August 15, 2021 |
| 33 |
August 16, 2021 |
August 22, 2021 |
| 34 |
August 23, 2021 |
August 29, 2021 |
| 35 |
August 30, 2021 |
September 05, 2021 |
| 36 |
September 06, 2021 |
September 12, 2021 |
| 37 |
September 13, 2021 |
September 19, 2021 |
| 38 |
September 20, 2021 |
September 26, 2021 |
| 39 |
September 27, 2021 |
October 03, 2021 |
| 40 |
October 04, 2021 |
October 10, 2021 |
| 41 |
October 11, 2021 |
October 17, 2021 |
| 42 |
October 18, 2021 |
October 24, 2021 |
| 43 |
October 25, 2021 |
October 31, 2021 |
| 44 |
November 01, 2021 |
November 07, 2021 |
| 45 |
November 08, 2021 |
November 14, 2021 |
| 46 |
November 15, 2021 |
November 21, 2021 |
| 47 |
November 22, 2021 |
November 28, 2021 |
| 48 |
November 29, 2021 |
December 05, 2021 |
| 49 |
December 06, 2021 |
December 12, 2021 |
| 50 |
December 13, 2021 |
December 19, 2021 |
| 51 |
December 20, 2021 |
December 26, 2021 |
| 52 |
December 27, 2021 |
January 02, 2022 |
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