Week Numbers 2021 in United States
Number of weeks in 2021 year is 52 weeks
Weeks are according United States calendar rules, Sunday first day and weeks are Sunday to Saturday
| Week # | From Date | To Date | Weeks from Now |
|---|---|---|---|
| Week 1 | January 3, 2021 | January 9, 2021 | passed 100 weeks ago |
| Week 2 | January 10, 2021 | January 16, 2021 | passed 99 weeks ago |
| Week 3 | January 17, 2021 | January 23, 2021 | passed 98 weeks ago |
| Week 4 | January 24, 2021 | January 30, 2021 | passed 97 weeks ago |
| Week 5 | January 31, 2021 | February 6, 2021 | passed 96 weeks ago |
| Week 6 | February 7, 2021 | February 13, 2021 | passed 95 weeks ago |
| Week 7 | February 14, 2021 | February 20, 2021 | passed 94 weeks ago |
| Week 8 | February 21, 2021 | February 27, 2021 | passed 93 weeks ago |
| Week 9 | February 28, 2021 | March 6, 2021 | passed 92 weeks ago |
| Week 10 | March 7, 2021 | March 13, 2021 | passed 91 weeks ago |
| Week 11 | March 14, 2021 | March 20, 2021 | passed 90 weeks ago |
| Week 12 | March 21, 2021 | March 27, 2021 | passed 89 weeks ago |
| Week 13 | March 28, 2021 | April 3, 2021 | passed 88 weeks ago |
| Week 14 | April 4, 2021 | April 10, 2021 | passed 87 weeks ago |
| Week 15 | April 11, 2021 | April 17, 2021 | passed 86 weeks ago |
| Week 16 | April 18, 2021 | April 24, 2021 | passed 85 weeks ago |
| Week 17 | April 25, 2021 | May 1, 2021 | passed 84 weeks ago |
| Week 18 | May 2, 2021 | May 8, 2021 | passed 83 weeks ago |
| Week 19 | May 9, 2021 | May 15, 2021 | passed 82 weeks ago |
| Week 20 | May 16, 2021 | May 22, 2021 | passed 81 weeks ago |
| Week 21 | May 23, 2021 | May 29, 2021 | passed 80 weeks ago |
| Week 22 | May 30, 2021 | June 5, 2021 | passed 79 weeks ago |
| Week 23 | June 6, 2021 | June 12, 2021 | passed 78 weeks ago |
| Week 24 | June 13, 2021 | June 19, 2021 | passed 77 weeks ago |
| Week 25 | June 20, 2021 | June 26, 2021 | passed 76 weeks ago |
| Week 26 | June 27, 2021 | July 3, 2021 | passed 75 weeks ago |
| Week 27 | July 4, 2021 | July 10, 2021 | passed 74 weeks ago |
| Week 28 | July 11, 2021 | July 17, 2021 | passed 73 weeks ago |
| Week 29 | July 18, 2021 | July 24, 2021 | passed 72 weeks ago |
| Week 30 | July 25, 2021 | July 31, 2021 | passed 71 weeks ago |
| Week 31 | August 1, 2021 | August 7, 2021 | passed 70 weeks ago |
| Week 32 | August 8, 2021 | August 14, 2021 | passed 69 weeks ago |
| Week 33 | August 15, 2021 | August 21, 2021 | passed 68 weeks ago |
| Week 34 | August 22, 2021 | August 28, 2021 | passed 67 weeks ago |
| Week 35 | August 29, 2021 | September 4, 2021 | passed 66 weeks ago |
| Week 36 | September 5, 2021 | September 11, 2021 | passed 65 weeks ago |
| Week 37 | September 12, 2021 | September 18, 2021 | passed 64 weeks ago |
| Week 38 | September 19, 2021 | September 25, 2021 | passed 63 weeks ago |
| Week 39 | September 26, 2021 | October 2, 2021 | passed 62 weeks ago |
| Week 40 | October 3, 2021 | October 9, 2021 | passed 61 weeks ago |
| Week 41 | October 10, 2021 | October 16, 2021 | passed 60 weeks ago |
| Week 42 | October 17, 2021 | October 23, 2021 | passed 59 weeks ago |
| Week 43 | October 24, 2021 | October 30, 2021 | passed 58 weeks ago |
| Week 44 | October 31, 2021 | November 6, 2021 | passed 57 weeks ago |
| Week 45 | November 7, 2021 | November 13, 2021 | passed 56 weeks ago |
| Week 46 | November 14, 2021 | November 20, 2021 | passed 55 weeks ago |
| Week 47 | November 21, 2021 | November 27, 2021 | passed 54 weeks ago |
| Week 48 | November 28, 2021 | December 4, 2021 | passed 53 weeks ago |
| Week 49 | December 5, 2021 | December 11, 2021 | passed 52 weeks ago |
| Week 50 | December 12, 2021 | December 18, 2021 | passed 51 weeks ago |
| Week 51 | December 19, 2021 | December 25, 2021 | passed 50 weeks ago |
| Week 52 | December 26, 2021 | January 1, 2022 | passed 49 weeks ago |