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2031 Calendar with Week Numbers

2031 has 52 ISO weeks. Week 1 runs from Monday, December 30, 2030 to Sunday, January 5, 2031. Each row below starts on Monday and shows its week number; the table lists every week with its dates.

January 2031
Wk
M
T
W
T
F
S
S
1
1
2
3
4
5
2
6
7
8
9
10
11
12
3
13
14
15
16
17
18
19
4
20
21
22
23
24
25
26
5
27
28
29
30
31
February 2031
Wk
M
T
W
T
F
S
S
5
1
2
6
3
4
5
6
7
8
9
7
10
11
12
13
14
15
16
8
17
18
19
20
21
22
23
9
24
25
26
27
28
March 2031
Wk
M
T
W
T
F
S
S
9
1
2
10
3
4
5
6
7
8
9
11
10
11
12
13
14
15
16
12
17
18
19
20
21
22
23
13
24
25
26
27
28
29
30
14
31
April 2031
Wk
M
T
W
T
F
S
S
14
1
2
3
4
5
6
15
7
8
9
10
11
12
13
16
14
15
16
17
18
19
20
17
21
22
23
24
25
26
27
18
28
29
30
May 2031
Wk
M
T
W
T
F
S
S
18
1
2
3
4
19
5
6
7
8
9
10
11
20
12
13
14
15
16
17
18
21
19
20
21
22
23
24
25
22
26
27
28
29
30
31
June 2031
Wk
M
T
W
T
F
S
S
22
1
23
2
3
4
5
6
7
8
24
9
10
11
12
13
14
15
25
16
17
18
19
20
21
22
26
23
24
25
26
27
28
29
27
30
July 2031
Wk
M
T
W
T
F
S
S
27
1
2
3
4
5
6
28
7
8
9
10
11
12
13
29
14
15
16
17
18
19
20
30
21
22
23
24
25
26
27
31
28
29
30
31
August 2031
Wk
M
T
W
T
F
S
S
31
1
2
3
32
4
5
6
7
8
9
10
33
11
12
13
14
15
16
17
34
18
19
20
21
22
23
24
35
25
26
27
28
29
30
31
September 2031
Wk
M
T
W
T
F
S
S
36
1
2
3
4
5
6
7
37
8
9
10
11
12
13
14
38
15
16
17
18
19
20
21
39
22
23
24
25
26
27
28
40
29
30
October 2031
Wk
M
T
W
T
F
S
S
40
1
2
3
4
5
41
6
7
8
9
10
11
12
42
13
14
15
16
17
18
19
43
20
21
22
23
24
25
26
44
27
28
29
30
31
November 2031
Wk
M
T
W
T
F
S
S
44
1
2
45
3
4
5
6
7
8
9
46
10
11
12
13
14
15
16
47
17
18
19
20
21
22
23
48
24
25
26
27
28
29
30
December 2031
Wk
M
T
W
T
F
S
S
49
1
2
3
4
5
6
7
50
8
9
10
11
12
13
14
51
15
16
17
18
19
20
21
52
22
23
24
25
26
27
28
1
29
30
31

All 52 Weeks of 2031

WeekStarts (Mon)Ends (Sun)Federal holidays
1Dec 30, 2030Jan 5, 2031New Year's Day
2Jan 6, 2031Jan 12, 2031—
3Jan 13, 2031Jan 19, 2031—
4Jan 20, 2031Jan 26, 2031MLK Day
5Jan 27, 2031Feb 2, 2031—
6Feb 3, 2031Feb 9, 2031—
7Feb 10, 2031Feb 16, 2031—
8Feb 17, 2031Feb 23, 2031Presidents' Day
9Feb 24, 2031Mar 2, 2031—
10Mar 3, 2031Mar 9, 2031—
11Mar 10, 2031Mar 16, 2031—
12Mar 17, 2031Mar 23, 2031—
13Mar 24, 2031Mar 30, 2031—
14Mar 31, 2031Apr 6, 2031—
15Apr 7, 2031Apr 13, 2031—
16Apr 14, 2031Apr 20, 2031—
17Apr 21, 2031Apr 27, 2031—
18Apr 28, 2031May 4, 2031—
19May 5, 2031May 11, 2031—
20May 12, 2031May 18, 2031—
21May 19, 2031May 25, 2031—
22May 26, 2031Jun 1, 2031Memorial Day
23Jun 2, 2031Jun 8, 2031—
24Jun 9, 2031Jun 15, 2031—
25Jun 16, 2031Jun 22, 2031Juneteenth
26Jun 23, 2031Jun 29, 2031—
27Jun 30, 2031Jul 6, 2031Independence Day
28Jul 7, 2031Jul 13, 2031—
29Jul 14, 2031Jul 20, 2031—
30Jul 21, 2031Jul 27, 2031—
31Jul 28, 2031Aug 3, 2031—
32Aug 4, 2031Aug 10, 2031—
33Aug 11, 2031Aug 17, 2031—
34Aug 18, 2031Aug 24, 2031—
35Aug 25, 2031Aug 31, 2031—
36Sep 1, 2031Sep 7, 2031Labor Day
37Sep 8, 2031Sep 14, 2031—
38Sep 15, 2031Sep 21, 2031—
39Sep 22, 2031Sep 28, 2031—
40Sep 29, 2031Oct 5, 2031—
41Oct 6, 2031Oct 12, 2031—
42Oct 13, 2031Oct 19, 2031Columbus Day
43Oct 20, 2031Oct 26, 2031—
44Oct 27, 2031Nov 2, 2031—
45Nov 3, 2031Nov 9, 2031—
46Nov 10, 2031Nov 16, 2031Veterans Day
47Nov 17, 2031Nov 23, 2031—
48Nov 24, 2031Nov 30, 2031Thanksgiving
49Dec 1, 2031Dec 7, 2031—
50Dec 8, 2031Dec 14, 2031—
51Dec 15, 2031Dec 21, 2031—
52Dec 22, 2031Dec 28, 2031Christmas Day

2031 Week Numbers FAQ

How many weeks are in 2031?

2031 has 52 ISO weeks. Week 1 runs from Monday, December 30, 2030 to Sunday, January 5, 2031, and week 52 ends on Sunday, December 28, 2031.

What week number is January 1, 2031?

January 1, 2031 is a Wednesday in week 1 of 2031.

How are ISO week numbers counted?

ISO 8601 weeks start on Monday. Week 1 is the week that contains the first Thursday of the year, which is the same as the week that contains January 4. A year has 52 weeks, or 53 when it starts on a Thursday (or on a Wednesday in a leap year).

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