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Calendar weeks 2025 - CW 2025

Thema Week Numbers ﹣ Calendar weeks 2025

The following table shows all ISO calendar weeks 2025 from 1 to 53, with their start date beginning on Monday and their end date falling on Sunday.

European and Asian ISO calendar weeks 2025 - CW 2025
CWStart of the CWEnd of the CW ISO-Name
CW 1Monday, December 30, 2024Sunday, January 5, 20252025‑W01
CW 2Monday, January 6, 2025Sunday, January 12, 20252025‑W02
CW 3Monday, January 13, 2025Sunday, January 19, 20252025‑W03
CW 4Monday, January 20, 2025Sunday, January 26, 20252025‑W04
CW 5Monday, January 27, 2025Sunday, February 2, 20252025‑W05
CW 6Monday, February 3, 2025Sunday, February 9, 20252025‑W06
CW 7Monday, February 10, 2025Sunday, February 16, 20252025‑W07
CW 8Monday, February 17, 2025Sunday, February 23, 20252025‑W08
CW 9Monday, February 24, 2025Sunday, March 2, 20252025‑W09
CW 10Monday, March 3, 2025Sunday, March 9, 20252025‑W10
CW 11Monday, March 10, 2025Sunday, March 16, 20252025‑W11
CW 12Monday, March 17, 2025Sunday, March 23, 20252025‑W12
CW 13Monday, March 24, 2025Sunday, March 30, 20252025‑W13
CW 14Monday, March 31, 2025Sunday, April 6, 20252025‑W14
CW 15Monday, April 7, 2025Sunday, April 13, 20252025‑W15
CW 16Monday, April 14, 2025Sunday, April 20, 20252025‑W16
CW 17Monday, April 21, 2025Sunday, April 27, 20252025‑W17
CW 18Monday, April 28, 2025Sunday, May 4, 20252025‑W18
CW 19Monday, May 5, 2025Sunday, May 11, 20252025‑W19
CW 20Monday, May 12, 2025Sunday, May 18, 20252025‑W20
CW 21Monday, May 19, 2025Sunday, May 25, 20252025‑W21
CW 22Monday, May 26, 2025Sunday, June 1, 20252025‑W22
CW 23Monday, June 2, 2025Sunday, June 8, 20252025‑W23
CW 24Monday, June 9, 2025Sunday, June 15, 20252025‑W24
CW 25Monday, June 16, 2025Sunday, June 22, 20252025‑W25
CW 26Monday, June 23, 2025Sunday, June 29, 20252025‑W26
CW 27Monday, June 30, 2025Sunday, July 6, 20252025‑W27
CW 28Monday, July 7, 2025Sunday, July 13, 20252025‑W28
CW 29Monday, July 14, 2025Sunday, July 20, 20252025‑W29
CW 30Monday, July 21, 2025Sunday, July 27, 20252025‑W30
CW 31Monday, July 28, 2025Sunday, August 3, 20252025‑W31
CW 32Monday, August 4, 2025Sunday, August 10, 20252025‑W32
CW 33Monday, August 11, 2025Sunday, August 17, 20252025‑W33
CW 34Monday, August 18, 2025Sunday, August 24, 20252025‑W34
CW 35Monday, August 25, 2025Sunday, August 31, 20252025‑W35
CW 36Monday, September 1, 2025Sunday, September 7, 20252025‑W36
CW 37Monday, September 8, 2025Sunday, September 14, 20252025‑W37
CW 38Monday, September 15, 2025Sunday, September 21, 20252025‑W38
CW 39Monday, September 22, 2025Sunday, September 28, 20252025‑W39
CW 40Monday, September 29, 2025Sunday, October 5, 20252025‑W40
CW 41Monday, October 6, 2025Sunday, October 12, 20252025‑W41
CW 42Monday, October 13, 2025Sunday, October 19, 20252025‑W42
CW 43Monday, October 20, 2025Sunday, October 26, 20252025‑W43
CW 44Monday, October 27, 2025Sunday, November 2, 20252025‑W44
CW 45Monday, November 3, 2025Sunday, November 9, 20252025‑W45
CW 46Monday, November 10, 2025Sunday, November 16, 20252025‑W46
CW 47Monday, November 17, 2025Sunday, November 23, 20252025‑W47
CW 48Monday, November 24, 2025Sunday, November 30, 20252025‑W48
CW 49Monday, December 1, 2025Sunday, December 7, 20252025‑W49
CW 50Monday, December 8, 2025Sunday, December 14, 20252025‑W50
CW 51Monday, December 15, 2025Sunday, December 21, 20252025‑W51
CW 52Monday, December 22, 2025Sunday, December 28, 20252025‑W52
CW 532025 does not exist week 532025 has only 52 calendar weeks2025‑W53

The ISO calendar weeks for 2025 are defined according to the international ISO standard. That is, each calendar week starts on Monday and ends on Sunday. Even during the change of year, a new calendar week starts on Monday and ends on Sunday. The ISO standard specifies that the majority of the first calendar week (i.e., at least four days) must lie in the new year.

Table of all American calendar weeks for 2025

The following table shows all "American" calendar weeks 2025, with their start date beginning on Sunday and their end date falling on Saturday.

American calendar weeks 2025 - CW 2025
CWStart of the CWEnd of the CW
1Wednesday, January 1, 2025Saturday, January 4, 2025
2Sunday, January 5, 2025Saturday, January 11, 2025
3Sunday, January 12, 2025Saturday, January 18, 2025
4Sunday, January 19, 2025Saturday, January 25, 2025
5Sunday, January 26, 2025Saturday, February 1, 2025
6Sunday, February 2, 2025Saturday, February 8, 2025
7Sunday, February 9, 2025Saturday, February 15, 2025
8Sunday, February 16, 2025Saturday, February 22, 2025
9Sunday, February 23, 2025Saturday, March 1, 2025
10Sunday, March 2, 2025Saturday, March 8, 2025
11Sunday, March 9, 2025Saturday, March 15, 2025
12Sunday, March 16, 2025Saturday, March 22, 2025
13Sunday, March 23, 2025Saturday, March 29, 2025
14Sunday, March 30, 2025Saturday, April 5, 2025
15Sunday, April 6, 2025Saturday, April 12, 2025
16Sunday, April 13, 2025Saturday, April 19, 2025
17Sunday, April 20, 2025Saturday, April 26, 2025
18Sunday, April 27, 2025Saturday, May 3, 2025
19Sunday, May 4, 2025Saturday, May 10, 2025
20Sunday, May 11, 2025Saturday, May 17, 2025
21Sunday, May 18, 2025Saturday, May 24, 2025
22Sunday, May 25, 2025Saturday, May 31, 2025
23Sunday, June 1, 2025Saturday, June 7, 2025
24Sunday, June 8, 2025Saturday, June 14, 2025
25Sunday, June 15, 2025Saturday, June 21, 2025
26Sunday, June 22, 2025Saturday, June 28, 2025
27Sunday, June 29, 2025Saturday, July 5, 2025
28Sunday, July 6, 2025Saturday, July 12, 2025
29Sunday, July 13, 2025Saturday, July 19, 2025
30Sunday, July 20, 2025Saturday, July 26, 2025
31Sunday, July 27, 2025Saturday, August 2, 2025
32Sunday, August 3, 2025Saturday, August 9, 2025
33Sunday, August 10, 2025Saturday, August 16, 2025
34Sunday, August 17, 2025Saturday, August 23, 2025
35Sunday, August 24, 2025Saturday, August 30, 2025
36Sunday, August 31, 2025Saturday, September 6, 2025
37Sunday, September 7, 2025Saturday, September 13, 2025
38Sunday, September 14, 2025Saturday, September 20, 2025
39Sunday, September 21, 2025Saturday, September 27, 2025
40Sunday, September 28, 2025Saturday, October 4, 2025
41Sunday, October 5, 2025Saturday, October 11, 2025
42Sunday, October 12, 2025Saturday, October 18, 2025
43Sunday, October 19, 2025Saturday, October 25, 2025
44Sunday, October 26, 2025Saturday, November 1, 2025
45Sunday, November 2, 2025Saturday, November 8, 2025
46Sunday, November 9, 2025Saturday, November 15, 2025
47Sunday, November 16, 2025Saturday, November 22, 2025
48Sunday, November 23, 2025Saturday, November 29, 2025
49Sunday, November 30, 2025Saturday, December 6, 2025
50Sunday, December 7, 2025Saturday, December 13, 2025
51Sunday, December 14, 2025Saturday, December 20, 2025
52Sunday, December 21, 2025Saturday, December 27, 2025
53Sunday, December 28, 2025Wednesday, December 31, 2025

The "American" calendar weeks for 2025 are used in the USA, Canada and most Latin American countries, Australia, Japan, Israel, South Korea and others. Unlike the otherwise internationally standardised ISO weeks, the American calendar weeks start on Sundays instead of Mondays and end on Saturdays. However, the first calendar week always begins on the 1st of January and the last always ends on the 31st of December. These two weeks can have fewer than seven days. There are always 53 calendar weeks, except in a leap year where 31st December is a Sunday. As a result, such a year will have 54 calendar weeks.

Calculation of any calendar weeks 2025

Source information

As source for the information in the "Week Numbers" category, we have used in particular:

Last update on October 4, 2022

The pages of the "Week Numbers" category were last editorially reviewed by Michael Mühl on October 4, 2022. They all correspond to the current status.

Previous changes on June 25, 2021