2025 Calendar Weeks

2025 Calendar Weeks

Introduction

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Video about 2025 Calendar Weeks

2025 Calendar Weeks

2025 Calendar with Week Numbers

Introduction

The Gregorian calendar, widely adopted around the world, divides the year into 52 weeks, with each week spanning seven days. In 2025, the first week of the year begins on Monday, January 1, and the last week ends on Sunday, December 31. However, due to the leap year, which occurs every four years, 2025 has an additional day, February 29, resulting in 53 calendar weeks.

Calendar Weeks

The calendar weeks in 2025 are numbered from 1 to 53, with each week representing a seven-day period. The following table lists the start and end dates for each calendar week:

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

Leap Day

February 29, 2025, is known as Leap Day, an additional day added to the calendar in leap years to keep the calendar in sync with the Earth’s orbit around the Sun. Leap Day occurs every four years, except for years divisible by 100 but not divisible by 400.

ISO Week Numbering

In addition to the standard calendar weeks, there is also the ISO week numbering system, defined by ISO 8601. The ISO week numbering system assigns each week a number from 01 to 53, with week 01 being the first week that contains at least four days of the new year. In 2025, ISO week 01 begins on Monday, December 30, 2024, and ends on Sunday, January 5, 2025.

Conclusion

The 2025 calendar consists of 53 calendar weeks, including Leap Day on February 29. The ISO week numbering system provides an alternative method for tracking weeks, with ISO week 01 starting on December 30, 2024. This comprehensive guide to the 2025 calendar weeks serves as a valuable resource for planning, scheduling, and time management.

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Closure

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