Week numbers 2026
2026 has 53 ISO weeks. Week 1 starts Monday 29 December 2025; week 53 ends Sunday 3 January 2027.
ISO 8601 week numbering: weeks run Monday–Sunday, and a week belongs to the year that contains its Thursday — so the first days of January can belong to the last week of the previous year, and vice versa.
todaycurrent weekother month
January 31 days · 22 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
1
29
30
31
1
2
3
4
2
5
6
7
8
9
10
11
3
12
13
14
15
16
17
18
4
19
20
21
22
23
24
25
5
26
27
28
29
30
31
1
February 28 days · 20 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
5
26
27
28
29
30
31
1
6
2
3
4
5
6
7
8
7
9
10
11
12
13
14
15
8
16
17
18
19
20
21
22
9
23
24
25
26
27
28
1
March 31 days · 22 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
9
23
24
25
26
27
28
1
10
2
3
4
5
6
7
8
11
9
10
11
12
13
14
15
12
16
17
18
19
20
21
22
13
23
24
25
26
27
28
29
14
30
31
1
2
3
4
5
April 30 days · 22 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
14
30
31
1
2
3
4
5
15
6
7
8
9
10
11
12
16
13
14
15
16
17
18
19
17
20
21
22
23
24
25
26
18
27
28
29
30
1
2
3
May 31 days · 21 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
18
27
28
29
30
1
2
3
19
4
5
6
7
8
9
10
20
11
12
13
14
15
16
17
21
18
19
20
21
22
23
24
22
25
26
27
28
29
30
31
June 30 days · 22 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
23
1
2
3
4
5
6
7
24
8
9
10
11
12
13
14
25
15
16
17
18
19
20
21
26
22
23
24
25
26
27
28
27
29
30
1
2
3
4
5
July 31 days · 23 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
27
29
30
1
2
3
4
5
28
6
7
8
9
10
11
12
29
13
14
15
16
17
18
19
30
20
21
22
23
24
25
26
31
27
28
29
30
31
1
2
August 31 days · 21 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
31
27
28
29
30
31
1
2
32
3
4
5
6
7
8
9
33
10
11
12
13
14
15
16
34
17
18
19
20
21
22
23
35
24
25
26
27
28
29
30
36
31
1
2
3
4
5
6
September 30 days · 22 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
36
31
1
2
3
4
5
6
37
7
8
9
10
11
12
13
38
14
15
16
17
18
19
20
39
21
22
23
24
25
26
27
40
28
29
30
1
2
3
4
October 31 days · 22 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
40
28
29
30
1
2
3
4
41
5
6
7
8
9
10
11
42
12
13
14
15
16
17
18
43
19
20
21
22
23
24
25
44
26
27
28
29
30
31
1
November 30 days · 21 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
44
26
27
28
29
30
31
1
45
2
3
4
5
6
7
8
46
9
10
11
12
13
14
15
47
16
17
18
19
20
21
22
48
23
24
25
26
27
28
29
49
30
1
2
3
4
5
6
December 31 days · 23 weekdays
Wk
Mo
Tu
We
Th
Fr
Sa
Su
49
30
1
2
3
4
5
6
50
7
8
9
10
11
12
13
51
14
15
16
17
18
19
20
52
21
22
23
24
25
26
27
53
28
29
30
31
1
2
3
All 53 weeks of 2026 as a list with dates
| ISO week | Starts (Monday) | Ends (Sunday) |
|---|---|---|
| Week 1 | 29 December 2025 | 4 January 2026 |
| Week 2 | 5 January 2026 | 11 January 2026 |
| Week 3 | 12 January 2026 | 18 January 2026 |
| Week 4 | 19 January 2026 | 25 January 2026 |
| Week 5 | 26 January 2026 | 1 February 2026 |
| Week 6 | 2 February 2026 | 8 February 2026 |
| Week 7 | 9 February 2026 | 15 February 2026 |
| Week 8 | 16 February 2026 | 22 February 2026 |
| Week 9 | 23 February 2026 | 1 March 2026 |
| Week 10 | 2 March 2026 | 8 March 2026 |
| Week 11 | 9 March 2026 | 15 March 2026 |
| Week 12 | 16 March 2026 | 22 March 2026 |
| Week 13 | 23 March 2026 | 29 March 2026 |
| Week 14 | 30 March 2026 | 5 April 2026 |
| Week 15 | 6 April 2026 | 12 April 2026 |
| Week 16 | 13 April 2026 | 19 April 2026 |
| Week 17 | 20 April 2026 | 26 April 2026 |
| Week 18 | 27 April 2026 | 3 May 2026 |
| Week 19 | 4 May 2026 | 10 May 2026 |
| Week 20 | 11 May 2026 | 17 May 2026 |
| Week 21 | 18 May 2026 | 24 May 2026 |
| Week 22 | 25 May 2026 | 31 May 2026 |
| Week 23 | 1 June 2026 | 7 June 2026 |
| Week 24 | 8 June 2026 | 14 June 2026 |
| Week 25 | 15 June 2026 | 21 June 2026 |
| Week 26 | 22 June 2026 | 28 June 2026 |
| Week 27 | 29 June 2026 | 5 July 2026 |
| Week 28 | 6 July 2026 | 12 July 2026 |
| Week 29 | 13 July 2026 | 19 July 2026 |
| Week 30 | 20 July 2026 | 26 July 2026 |
| Week 31 | 27 July 2026 | 2 August 2026 |
| Week 32 | 3 August 2026 | 9 August 2026 |
| Week 33 | 10 August 2026 | 16 August 2026 |
| Week 34 | 17 August 2026 | 23 August 2026 |
| Week 35 | 24 August 2026 | 30 August 2026 |
| Week 36 | 31 August 2026 | 6 September 2026 |
| Week 37 | 7 September 2026 | 13 September 2026 |
| Week 38 | 14 September 2026 | 20 September 2026 |
| Week 39 | 21 September 2026 | 27 September 2026 |
| Week 40 | 28 September 2026 | 4 October 2026 |
| Week 41 | 5 October 2026 | 11 October 2026 |
| Week 42 | 12 October 2026 | 18 October 2026 |
| Week 43 | 19 October 2026 | 25 October 2026 |
| Week 44 | 26 October 2026 | 1 November 2026 |
| Week 45 | 2 November 2026 | 8 November 2026 |
| Week 46 | 9 November 2026 | 15 November 2026 |
| Week 47 | 16 November 2026 | 22 November 2026 |
| Week 48 | 23 November 2026 | 29 November 2026 |
| Week 49 | 30 November 2026 | 6 December 2026 |
| Week 50 | 7 December 2026 | 13 December 2026 |
| Week 51 | 14 December 2026 | 20 December 2026 |
| Week 52 | 21 December 2026 | 27 December 2026 |
| Week 53 | 28 December 2026 | 3 January 2027 |