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 236 weeks ago |
| Week 2 | January 10, 2021 | January 16, 2021 | passed 235 weeks ago |
| Week 3 | January 17, 2021 | January 23, 2021 | passed 234 weeks ago |
| Week 4 | January 24, 2021 | January 30, 2021 | passed 233 weeks ago |
| Week 5 | January 31, 2021 | February 6, 2021 | passed 232 weeks ago |
| Week 6 | February 7, 2021 | February 13, 2021 | passed 231 weeks ago |
| Week 7 | February 14, 2021 | February 20, 2021 | passed 230 weeks ago |
| Week 8 | February 21, 2021 | February 27, 2021 | passed 229 weeks ago |
| Week 9 | February 28, 2021 | March 6, 2021 | passed 228 weeks ago |
| Week 10 | March 7, 2021 | March 13, 2021 | passed 227 weeks ago |
| Week 11 | March 14, 2021 | March 20, 2021 | passed 226 weeks ago |
| Week 12 | March 21, 2021 | March 27, 2021 | passed 225 weeks ago |
| Week 13 | March 28, 2021 | April 3, 2021 | passed 224 weeks ago |
| Week 14 | April 4, 2021 | April 10, 2021 | passed 223 weeks ago |
| Week 15 | April 11, 2021 | April 17, 2021 | passed 222 weeks ago |
| Week 16 | April 18, 2021 | April 24, 2021 | passed 221 weeks ago |
| Week 17 | April 25, 2021 | May 1, 2021 | passed 220 weeks ago |
| Week 18 | May 2, 2021 | May 8, 2021 | passed 219 weeks ago |
| Week 19 | May 9, 2021 | May 15, 2021 | passed 218 weeks ago |
| Week 20 | May 16, 2021 | May 22, 2021 | passed 217 weeks ago |
| Week 21 | May 23, 2021 | May 29, 2021 | passed 216 weeks ago |
| Week 22 | May 30, 2021 | June 5, 2021 | passed 215 weeks ago |
| Week 23 | June 6, 2021 | June 12, 2021 | passed 214 weeks ago |
| Week 24 | June 13, 2021 | June 19, 2021 | passed 213 weeks ago |
| Week 25 | June 20, 2021 | June 26, 2021 | passed 212 weeks ago |
| Week 26 | June 27, 2021 | July 3, 2021 | passed 211 weeks ago |
| Week 27 | July 4, 2021 | July 10, 2021 | passed 210 weeks ago |
| Week 28 | July 11, 2021 | July 17, 2021 | passed 209 weeks ago |
| Week 29 | July 18, 2021 | July 24, 2021 | passed 208 weeks ago |
| Week 30 | July 25, 2021 | July 31, 2021 | passed 207 weeks ago |
| Week 31 | August 1, 2021 | August 7, 2021 | passed 206 weeks ago |
| Week 32 | August 8, 2021 | August 14, 2021 | passed 205 weeks ago |
| Week 33 | August 15, 2021 | August 21, 2021 | passed 204 weeks ago |
| Week 34 | August 22, 2021 | August 28, 2021 | passed 203 weeks ago |
| Week 35 | August 29, 2021 | September 4, 2021 | passed 202 weeks ago |
| Week 36 | September 5, 2021 | September 11, 2021 | passed 201 weeks ago |
| Week 37 | September 12, 2021 | September 18, 2021 | passed 200 weeks ago |
| Week 38 | September 19, 2021 | September 25, 2021 | passed 199 weeks ago |
| Week 39 | September 26, 2021 | October 2, 2021 | passed 198 weeks ago |
| Week 40 | October 3, 2021 | October 9, 2021 | passed 197 weeks ago |
| Week 41 | October 10, 2021 | October 16, 2021 | passed 196 weeks ago |
| Week 42 | October 17, 2021 | October 23, 2021 | passed 195 weeks ago |
| Week 43 | October 24, 2021 | October 30, 2021 | passed 194 weeks ago |
| Week 44 | October 31, 2021 | November 6, 2021 | passed 193 weeks ago |
| Week 45 | November 7, 2021 | November 13, 2021 | passed 192 weeks ago |
| Week 46 | November 14, 2021 | November 20, 2021 | passed 191 weeks ago |
| Week 47 | November 21, 2021 | November 27, 2021 | passed 190 weeks ago |
| Week 48 | November 28, 2021 | December 4, 2021 | passed 189 weeks ago |
| Week 49 | December 5, 2021 | December 11, 2021 | passed 188 weeks ago |
| Week 50 | December 12, 2021 | December 18, 2021 | passed 187 weeks ago |
| Week 51 | December 19, 2021 | December 25, 2021 | passed 186 weeks ago |
| Week 52 | December 26, 2021 | January 1, 2022 | passed 185 weeks ago |