Week numbers 243

243 has 52 ISO weeks. Week 1: Jan 2 – 8 · Week 52: Dec 25 – 31

243 at a glance

Weeks in 24352
Week 1January 2, 243 – January 8, 243
Week 52December 25, 243 – December 31, 243
Days in 243365
Leap yearNo

All Weeks in 243

Week From To Month
Week 1 in 243 January 2, 243 January 8, 243 January
Week 2 in 243 January 9, 243 January 15, 243 January
Week 3 in 243 January 16, 243 January 22, 243 January
Week 4 in 243 January 23, 243 January 29, 243 January
Week 5 in 243 January 30, 243 February 5, 243 January / February
Week 6 in 243 February 6, 243 February 12, 243 February
Week 7 in 243 February 13, 243 February 19, 243 February
Week 8 in 243 February 20, 243 February 26, 243 February
Week 9 in 243 February 27, 243 March 5, 243 February / March
Week 10 in 243 March 6, 243 March 12, 243 March
Week 11 in 243 March 13, 243 March 19, 243 March
Week 12 in 243 March 20, 243 March 26, 243 March
Week 13 in 243 March 27, 243 April 2, 243 March / April
Week 14 in 243 April 3, 243 April 9, 243 April
Week 15 in 243 April 10, 243 April 16, 243 April
Week 16 in 243 April 17, 243 April 23, 243 April
Week 17 in 243 April 24, 243 April 30, 243 April
Week 18 in 243 May 1, 243 May 7, 243 May
Week 19 in 243 May 8, 243 May 14, 243 May
Week 20 in 243 May 15, 243 May 21, 243 May
Week 21 in 243 May 22, 243 May 28, 243 May
Week 22 in 243 May 29, 243 June 4, 243 May / June
Week 23 in 243 June 5, 243 June 11, 243 June
Week 24 in 243 June 12, 243 June 18, 243 June
Week 25 in 243 June 19, 243 June 25, 243 June
Week 26 in 243 June 26, 243 July 2, 243 June / July
Week 27 in 243 July 3, 243 July 9, 243 July
Week 28 in 243 July 10, 243 July 16, 243 July
Week 29 in 243 July 17, 243 July 23, 243 July
Week 30 in 243 July 24, 243 July 30, 243 July
Week 31 in 243 July 31, 243 August 6, 243 July / August
Week 32 in 243 August 7, 243 August 13, 243 August
Week 33 in 243 August 14, 243 August 20, 243 August
Week 34 in 243 August 21, 243 August 27, 243 August
Week 35 in 243 August 28, 243 September 3, 243 August / September
Week 36 in 243 September 4, 243 September 10, 243 September
Week 37 in 243 September 11, 243 September 17, 243 September
Week 38 in 243 September 18, 243 September 24, 243 September
Week 39 in 243 September 25, 243 October 1, 243 September / October
Week 40 in 243 October 2, 243 October 8, 243 October
Week 41 in 243 October 9, 243 October 15, 243 October
Week 42 in 243 October 16, 243 October 22, 243 October
Week 43 in 243 October 23, 243 October 29, 243 October
Week 44 in 243 October 30, 243 November 5, 243 October / November
Week 45 in 243 November 6, 243 November 12, 243 November
Week 46 in 243 November 13, 243 November 19, 243 November
Week 47 in 243 November 20, 243 November 26, 243 November
Week 48 in 243 November 27, 243 December 3, 243 November / December
Week 49 in 243 December 4, 243 December 10, 243 December
Week 50 in 243 December 11, 243 December 17, 243 December
Week 51 in 243 December 18, 243 December 24, 243 December
Week 52 in 243 December 25, 243 December 31, 243 December

Calendars 243

January 243
MoTuWeThFrSaSu
Week 521
Week 12345678
Week 29101112131415
Week 316171819202122
Week 423242526272829
Week 53031
February 243
MoTuWeThFrSaSu
Week 512345
Week 66789101112
Week 713141516171819
Week 820212223242526
Week 92728
March 243
MoTuWeThFrSaSu
Week 912345
Week 106789101112
Week 1113141516171819
Week 1220212223242526
Week 132728293031
April 243
MoTuWeThFrSaSu
Week 1312
Week 143456789
Week 1510111213141516
Week 1617181920212223
Week 1724252627282930
May 243
MoTuWeThFrSaSu
Week 181234567
Week 19891011121314
Week 2015161718192021
Week 2122232425262728
Week 22293031
June 243
MoTuWeThFrSaSu
Week 221234
Week 23567891011
Week 2412131415161718
Week 2519202122232425
Week 262627282930
July 243
MoTuWeThFrSaSu
Week 2612
Week 273456789
Week 2810111213141516
Week 2917181920212223
Week 3024252627282930
Week 3131
August 243
MoTuWeThFrSaSu
Week 31123456
Week 3278910111213
Week 3314151617181920
Week 3421222324252627
Week 3528293031
September 243
MoTuWeThFrSaSu
Week 35123
Week 3645678910
Week 3711121314151617
Week 3818192021222324
Week 39252627282930
October 243
MoTuWeThFrSaSu
Week 391
Week 402345678
Week 419101112131415
Week 4216171819202122
Week 4323242526272829
Week 443031
November 243
MoTuWeThFrSaSu
Week 4412345
Week 456789101112
Week 4613141516171819
Week 4720212223242526
Week 4827282930
December 243
MoTuWeThFrSaSu
Week 1123
Week 4945678910
Week 5011121314151617
Week 5118192021222324
Week 5225262728293031

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Find the week number of a date

How week numbers are counted

Most of the world numbers weeks according to the ISO 8601 standard. A week starts on Monday, and week 1 is the week that contains the first Thursday of the year, which is always the week that contains 4 January.

Week 1 of 243 starts on January 2, 243 and ends on January 8, 243 (ISO 8601, Monday to Sunday). 243 has 52 ISO weeks.

Because of this rule, the first days of January can belong to the last week of the previous year, and the last days of December can belong to week 1 of the next year.

In the United States, weeks usually start on Sunday and week 1 is the week that contains 1 January, so the US week number can differ from the ISO week number.

Frequently Asked Questions (FAQ)

How many weeks does 243 have?

243 has 52 ISO weeks.

When does week 1 of 243 start?

Week 1 of 243 starts on January 2, 243 and ends on January 8, 243 (ISO 8601, Monday to Sunday).

When does the last week of 243 end?

Week 52 of 243 starts on December 25, 243 and ends on December 31, 243 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 246, 252, 257, 263, 268.

Why do the US and Europe show different week numbers?

Europe follows ISO 8601: weeks start on Monday and week 1 is the week with the first Thursday of the year. In the US, weeks usually start on Sunday and week 1 is the week that contains 1 January, so the two numbers can differ by one.