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Week Numbers 2027

Complete list of all 52 weeks in 2027 with ISO week numbers and date ranges. 365 days total.

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52

Total Weeks

365

Total Days

Jan 4

Week 1 Starts

Jan 2

Week 52 Ends

2027 Week Numbers by Quarter

All 52 Weeks of 2027

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

Download Printable Week Number Calendar

Get a printable PDF calendar with week numbers for easy reference.

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Frequently Asked Questions

What are the week numbers for 2027?

2027 has 52 weeks, numbered from Week 1 (starting Jan 4) to Week 52 (ending Jan 2).

How do ISO week numbers work?

ISO 8601 defines weeks starting on Monday and ending on Sunday. Week 1 is the week containing the first Thursday of the year (or January 4th).

What week number is today?

Today is in Week 23 of 2026. You can use our calendar to find the week number for any date.

Why are week numbers useful?

Week numbers simplify scheduling, project planning, and reporting. They're widely used in business, manufacturing, and logistics to track deadlines and milestones.

More 2027 Resources

2027 Calendar

Full year overview

How Many Weeks?

52 weeks explained

Working Days

Business days in 2027

Calendar Editor

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Create a 2027 Calendar with Week Numbers

Design a customized calendar showing all 52 weeks. Perfect for project planning and scheduling.

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