Week numbers 143

143 has 52 ISO weeks. Week 1: Dec 31, 142 – Jan 6, 143 · Week 52: Dec 23 – 29

143 at a glance

Weeks in 14352
Week 1December 31, 142 – January 6, 143
Week 52December 23, 143 – December 29, 143
Days in 143365
Leap yearNo

All Weeks in 143

Week From To Month
Week 1 in 143 December 31, 142 January 6, 143 December / January
Week 2 in 143 January 7, 143 January 13, 143 January
Week 3 in 143 January 14, 143 January 20, 143 January
Week 4 in 143 January 21, 143 January 27, 143 January
Week 5 in 143 January 28, 143 February 3, 143 January / February
Week 6 in 143 February 4, 143 February 10, 143 February
Week 7 in 143 February 11, 143 February 17, 143 February
Week 8 in 143 February 18, 143 February 24, 143 February
Week 9 in 143 February 25, 143 March 3, 143 February / March
Week 10 in 143 March 4, 143 March 10, 143 March
Week 11 in 143 March 11, 143 March 17, 143 March
Week 12 in 143 March 18, 143 March 24, 143 March
Week 13 in 143 March 25, 143 March 31, 143 March
Week 14 in 143 April 1, 143 April 7, 143 April
Week 15 in 143 April 8, 143 April 14, 143 April
Week 16 in 143 April 15, 143 April 21, 143 April
Week 17 in 143 April 22, 143 April 28, 143 April
Week 18 in 143 April 29, 143 May 5, 143 April / May
Week 19 in 143 May 6, 143 May 12, 143 May
Week 20 in 143 May 13, 143 May 19, 143 May
Week 21 in 143 May 20, 143 May 26, 143 May
Week 22 in 143 May 27, 143 June 2, 143 May / June
Week 23 in 143 June 3, 143 June 9, 143 June
Week 24 in 143 June 10, 143 June 16, 143 June
Week 25 in 143 June 17, 143 June 23, 143 June
Week 26 in 143 June 24, 143 June 30, 143 June
Week 27 in 143 July 1, 143 July 7, 143 July
Week 28 in 143 July 8, 143 July 14, 143 July
Week 29 in 143 July 15, 143 July 21, 143 July
Week 30 in 143 July 22, 143 July 28, 143 July
Week 31 in 143 July 29, 143 August 4, 143 July / August
Week 32 in 143 August 5, 143 August 11, 143 August
Week 33 in 143 August 12, 143 August 18, 143 August
Week 34 in 143 August 19, 143 August 25, 143 August
Week 35 in 143 August 26, 143 September 1, 143 August / September
Week 36 in 143 September 2, 143 September 8, 143 September
Week 37 in 143 September 9, 143 September 15, 143 September
Week 38 in 143 September 16, 143 September 22, 143 September
Week 39 in 143 September 23, 143 September 29, 143 September
Week 40 in 143 September 30, 143 October 6, 143 September / October
Week 41 in 143 October 7, 143 October 13, 143 October
Week 42 in 143 October 14, 143 October 20, 143 October
Week 43 in 143 October 21, 143 October 27, 143 October
Week 44 in 143 October 28, 143 November 3, 143 October / November
Week 45 in 143 November 4, 143 November 10, 143 November
Week 46 in 143 November 11, 143 November 17, 143 November
Week 47 in 143 November 18, 143 November 24, 143 November
Week 48 in 143 November 25, 143 December 1, 143 November / December
Week 49 in 143 December 2, 143 December 8, 143 December
Week 50 in 143 December 9, 143 December 15, 143 December
Week 51 in 143 December 16, 143 December 22, 143 December
Week 52 in 143 December 23, 143 December 29, 143 December

Calendars 143

January 143
MoTuWeThFrSaSu
Week 1123456
Week 278910111213
Week 314151617181920
Week 421222324252627
Week 528293031
February 143
MoTuWeThFrSaSu
Week 5123
Week 645678910
Week 711121314151617
Week 818192021222324
Week 925262728
March 143
MoTuWeThFrSaSu
Week 9123
Week 1045678910
Week 1111121314151617
Week 1218192021222324
Week 1325262728293031
April 143
MoTuWeThFrSaSu
Week 141234567
Week 15891011121314
Week 1615161718192021
Week 1722232425262728
Week 182930
May 143
MoTuWeThFrSaSu
Week 1812345
Week 196789101112
Week 2013141516171819
Week 2120212223242526
Week 222728293031
June 143
MoTuWeThFrSaSu
Week 2212
Week 233456789
Week 2410111213141516
Week 2517181920212223
Week 2624252627282930
July 143
MoTuWeThFrSaSu
Week 271234567
Week 28891011121314
Week 2915161718192021
Week 3022232425262728
Week 31293031
August 143
MoTuWeThFrSaSu
Week 311234
Week 32567891011
Week 3312131415161718
Week 3419202122232425
Week 35262728293031
September 143
MoTuWeThFrSaSu
Week 351
Week 362345678
Week 379101112131415
Week 3816171819202122
Week 3923242526272829
Week 4030
October 143
MoTuWeThFrSaSu
Week 40123456
Week 4178910111213
Week 4214151617181920
Week 4321222324252627
Week 4428293031
November 143
MoTuWeThFrSaSu
Week 44123
Week 4545678910
Week 4611121314151617
Week 4718192021222324
Week 48252627282930
December 143
MoTuWeThFrSaSu
Week 21
Week 492345678
Week 509101112131415
Week 5116171819202122
Week 5223242526272829
Week 13031

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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 143 starts on December 31, 142 and ends on January 6, 143 (ISO 8601, Monday to Sunday). 143 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 143 have?

143 has 52 ISO weeks.

When does week 1 of 143 start?

Week 1 of 143 starts on December 31, 142 and ends on January 6, 143 (ISO 8601, Monday to Sunday).

When does the last week of 143 end?

Week 52 of 143 starts on December 23, 143 and ends on December 29, 143 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 144, 150, 156, 161, 167.

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.