Weeknumber.io

Monday-first year view

2027 calendar with week numbers

A compact calendar showing the ISO week number beside every Monday–Sunday row. Select a week number to see that week's dates and holidays.

2027 PDF (A4)2027 PDF (US Letter)Monthly PDFs

January

WkMTWTFSS
53
1
2
3
4

February

WkMTWTFSS
5
6
7
8

March

WkMTWTFSS
9
10
11
12
13

April

WkMTWTFSS
13
14
15
16
17

May

WkMTWTFSS
17
18
19
20
21
22

June

WkMTWTFSS
22
23
24
25
26

July

WkMTWTFSS
26
27
28
29
30

August

WkMTWTFSS
30
31
32
33
34
35

September

WkMTWTFSS
35
36
37
38
39

October

WkMTWTFSS
39
40
41
42
43

November

WkMTWTFSS
44
45
46
47
48

December

WkMTWTFSS
48
49
50
51
52

Wk means ISO week number. Muted dates belong to the previous or following month. The current date and week are highlighted when viewing the current year.

US federal holidays 2027

HolidayDateISO week
New Year's DayWeek 53
Martin Luther King Jr. DayWeek 3
Washington's Birthday (Presidents' Day)Week 7
Memorial DayWeek 22
Juneteenth National Independence DayWeek 24
Independence DayWeek 26
Labor DayWeek 36
Columbus Day (Indigenous Peoples' Day)Week 41
Veterans DayWeek 45
Thanksgiving DayWeek 47
Christmas DayWeek 51

When a fixed-date holiday falls on a Saturday or Sunday, the day off is usually observed on the Friday before or the Monday after.

How to read week numbers

Each row is one ISO week, Monday to Sunday. Week 1 is the week with the first Thursday of the year, so the first row of January can start in December. 2027 has 52 ISO weeks.

US wall calendars often start the week on Sunday and number weeks differently. If a colleague quotes another number, check which system they use, or compare both on the week pages.