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Week Numbers 2021

2021 has 52 ISO weeks. Week 1 starts on Monday, January 4, 2021, and the last week ends on Sunday, January 2, 2022.

ISO week numbers 2021

Weeks start on Monday. Week 1 is the week with the first Thursday of January. Find the week number of any date.

WeekMondaySunday
1Jan 4, 2021Jan 10, 2021
2Jan 11, 2021Jan 17, 2021
3Jan 18, 2021Jan 24, 2021
4Jan 25, 2021Jan 31, 2021
5Feb 1, 2021Feb 7, 2021
6Feb 8, 2021Feb 14, 2021
7Feb 15, 2021Feb 21, 2021
8Feb 22, 2021Feb 28, 2021
9Mar 1, 2021Mar 7, 2021
10Mar 8, 2021Mar 14, 2021
11Mar 15, 2021Mar 21, 2021
12Mar 22, 2021Mar 28, 2021
13Mar 29, 2021Apr 4, 2021
14Apr 5, 2021Apr 11, 2021
15Apr 12, 2021Apr 18, 2021
16Apr 19, 2021Apr 25, 2021
17Apr 26, 2021May 2, 2021
18May 3, 2021May 9, 2021
19May 10, 2021May 16, 2021
20May 17, 2021May 23, 2021
21May 24, 2021May 30, 2021
22May 31, 2021Jun 6, 2021
23Jun 7, 2021Jun 13, 2021
24Jun 14, 2021Jun 20, 2021
25Jun 21, 2021Jun 27, 2021
26Jun 28, 2021Jul 4, 2021
27Jul 5, 2021Jul 11, 2021
28Jul 12, 2021Jul 18, 2021
29Jul 19, 2021Jul 25, 2021
30Jul 26, 2021Aug 1, 2021
31Aug 2, 2021Aug 8, 2021
32Aug 9, 2021Aug 15, 2021
33Aug 16, 2021Aug 22, 2021
34Aug 23, 2021Aug 29, 2021
35Aug 30, 2021Sep 5, 2021
36Sep 6, 2021Sep 12, 2021
37Sep 13, 2021Sep 19, 2021
38Sep 20, 2021Sep 26, 2021
39Sep 27, 2021Oct 3, 2021
40Oct 4, 2021Oct 10, 2021
41Oct 11, 2021Oct 17, 2021
42Oct 18, 2021Oct 24, 2021
43Oct 25, 2021Oct 31, 2021
44Nov 1, 2021Nov 7, 2021
45Nov 8, 2021Nov 14, 2021
46Nov 15, 2021Nov 21, 2021
47Nov 22, 2021Nov 28, 2021
48Nov 29, 2021Dec 5, 2021
49Dec 6, 2021Dec 12, 2021
50Dec 13, 2021Dec 19, 2021
51Dec 20, 2021Dec 26, 2021
52Dec 27, 2021Jan 2, 2022
US weeks starting on Sunday

In the US, week 1 is the week that contains January 1, and weeks start on Sunday.

WeekSundaySaturday
1Dec 27, 2020Jan 2, 2021
2Jan 3, 2021Jan 9, 2021
3Jan 10, 2021Jan 16, 2021
4Jan 17, 2021Jan 23, 2021
5Jan 24, 2021Jan 30, 2021
6Jan 31, 2021Feb 6, 2021
7Feb 7, 2021Feb 13, 2021
8Feb 14, 2021Feb 20, 2021
9Feb 21, 2021Feb 27, 2021
10Feb 28, 2021Mar 6, 2021
11Mar 7, 2021Mar 13, 2021
12Mar 14, 2021Mar 20, 2021
13Mar 21, 2021Mar 27, 2021
14Mar 28, 2021Apr 3, 2021
15Apr 4, 2021Apr 10, 2021
16Apr 11, 2021Apr 17, 2021
17Apr 18, 2021Apr 24, 2021
18Apr 25, 2021May 1, 2021
19May 2, 2021May 8, 2021
20May 9, 2021May 15, 2021
21May 16, 2021May 22, 2021
22May 23, 2021May 29, 2021
23May 30, 2021Jun 5, 2021
24Jun 6, 2021Jun 12, 2021
25Jun 13, 2021Jun 19, 2021
26Jun 20, 2021Jun 26, 2021
27Jun 27, 2021Jul 3, 2021
28Jul 4, 2021Jul 10, 2021
29Jul 11, 2021Jul 17, 2021
30Jul 18, 2021Jul 24, 2021
31Jul 25, 2021Jul 31, 2021
32Aug 1, 2021Aug 7, 2021
33Aug 8, 2021Aug 14, 2021
34Aug 15, 2021Aug 21, 2021
35Aug 22, 2021Aug 28, 2021
36Aug 29, 2021Sep 4, 2021
37Sep 5, 2021Sep 11, 2021
38Sep 12, 2021Sep 18, 2021
39Sep 19, 2021Sep 25, 2021
40Sep 26, 2021Oct 2, 2021
41Oct 3, 2021Oct 9, 2021
42Oct 10, 2021Oct 16, 2021
43Oct 17, 2021Oct 23, 2021
44Oct 24, 2021Oct 30, 2021
45Oct 31, 2021Nov 6, 2021
46Nov 7, 2021Nov 13, 2021
47Nov 14, 2021Nov 20, 2021
48Nov 21, 2021Nov 27, 2021
49Nov 28, 2021Dec 4, 2021
50Dec 5, 2021Dec 11, 2021
51Dec 12, 2021Dec 18, 2021
52Dec 19, 2021Dec 25, 2021
53Dec 26, 2021Jan 1, 2022

Printable 2021 calendar with week numbers

The calendar shows ISO week numbers with weeks starting on Monday. Change either in the settings.

Saved in this browserClick any day to type on it. Use ← → for the previous or next month.Tap any day to add a note or highlight it.

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