Week numbers 151

151 has 52 ISO weeks. Week 1: Jan 4 – 10 · Week 52: Dec 27, 151 – Jan 2, 152

151 at a glance

Weeks in 15152
Week 1January 4, 151 – January 10, 151
Week 52December 27, 151 – January 2, 152
Days in 151365
Leap yearNo

All Weeks in 151

Week From To Month
Week 1 in 151 January 4, 151 January 10, 151 January
Week 2 in 151 January 11, 151 January 17, 151 January
Week 3 in 151 January 18, 151 January 24, 151 January
Week 4 in 151 January 25, 151 January 31, 151 January
Week 5 in 151 February 1, 151 February 7, 151 February
Week 6 in 151 February 8, 151 February 14, 151 February
Week 7 in 151 February 15, 151 February 21, 151 February
Week 8 in 151 February 22, 151 February 28, 151 February
Week 9 in 151 March 1, 151 March 7, 151 March
Week 10 in 151 March 8, 151 March 14, 151 March
Week 11 in 151 March 15, 151 March 21, 151 March
Week 12 in 151 March 22, 151 March 28, 151 March
Week 13 in 151 March 29, 151 April 4, 151 March / April
Week 14 in 151 April 5, 151 April 11, 151 April
Week 15 in 151 April 12, 151 April 18, 151 April
Week 16 in 151 April 19, 151 April 25, 151 April
Week 17 in 151 April 26, 151 May 2, 151 April / May
Week 18 in 151 May 3, 151 May 9, 151 May
Week 19 in 151 May 10, 151 May 16, 151 May
Week 20 in 151 May 17, 151 May 23, 151 May
Week 21 in 151 May 24, 151 May 30, 151 May
Week 22 in 151 May 31, 151 June 6, 151 May / June
Week 23 in 151 June 7, 151 June 13, 151 June
Week 24 in 151 June 14, 151 June 20, 151 June
Week 25 in 151 June 21, 151 June 27, 151 June
Week 26 in 151 June 28, 151 July 4, 151 June / July
Week 27 in 151 July 5, 151 July 11, 151 July
Week 28 in 151 July 12, 151 July 18, 151 July
Week 29 in 151 July 19, 151 July 25, 151 July
Week 30 in 151 July 26, 151 August 1, 151 July / August
Week 31 in 151 August 2, 151 August 8, 151 August
Week 32 in 151 August 9, 151 August 15, 151 August
Week 33 in 151 August 16, 151 August 22, 151 August
Week 34 in 151 August 23, 151 August 29, 151 August
Week 35 in 151 August 30, 151 September 5, 151 August / September
Week 36 in 151 September 6, 151 September 12, 151 September
Week 37 in 151 September 13, 151 September 19, 151 September
Week 38 in 151 September 20, 151 September 26, 151 September
Week 39 in 151 September 27, 151 October 3, 151 September / October
Week 40 in 151 October 4, 151 October 10, 151 October
Week 41 in 151 October 11, 151 October 17, 151 October
Week 42 in 151 October 18, 151 October 24, 151 October
Week 43 in 151 October 25, 151 October 31, 151 October
Week 44 in 151 November 1, 151 November 7, 151 November
Week 45 in 151 November 8, 151 November 14, 151 November
Week 46 in 151 November 15, 151 November 21, 151 November
Week 47 in 151 November 22, 151 November 28, 151 November
Week 48 in 151 November 29, 151 December 5, 151 November / December
Week 49 in 151 December 6, 151 December 12, 151 December
Week 50 in 151 December 13, 151 December 19, 151 December
Week 51 in 151 December 20, 151 December 26, 151 December
Week 52 in 151 December 27, 151 January 2, 152 December / January

Calendars 151

January 151
MoTuWeThFrSaSu
Week 53123
Week 145678910
Week 211121314151617
Week 318192021222324
Week 425262728293031
February 151
MoTuWeThFrSaSu
Week 51234567
Week 6891011121314
Week 715161718192021
Week 822232425262728
March 151
MoTuWeThFrSaSu
Week 91234567
Week 10891011121314
Week 1115161718192021
Week 1222232425262728
Week 13293031
April 151
MoTuWeThFrSaSu
Week 131234
Week 14567891011
Week 1512131415161718
Week 1619202122232425
Week 172627282930
May 151
MoTuWeThFrSaSu
Week 1712
Week 183456789
Week 1910111213141516
Week 2017181920212223
Week 2124252627282930
Week 2231
June 151
MoTuWeThFrSaSu
Week 22123456
Week 2378910111213
Week 2414151617181920
Week 2521222324252627
Week 26282930
July 151
MoTuWeThFrSaSu
Week 261234
Week 27567891011
Week 2812131415161718
Week 2919202122232425
Week 30262728293031
August 151
MoTuWeThFrSaSu
Week 301
Week 312345678
Week 329101112131415
Week 3316171819202122
Week 3423242526272829
Week 353031
September 151
MoTuWeThFrSaSu
Week 3512345
Week 366789101112
Week 3713141516171819
Week 3820212223242526
Week 3927282930
October 151
MoTuWeThFrSaSu
Week 39123
Week 4045678910
Week 4111121314151617
Week 4218192021222324
Week 4325262728293031
November 151
MoTuWeThFrSaSu
Week 441234567
Week 45891011121314
Week 4615161718192021
Week 4722232425262728
Week 482930
December 151
MoTuWeThFrSaSu
Week 112345
Week 496789101112
Week 5013141516171819
Week 5120212223242526
Week 522728293031

Download Calendar in printable A4 PDF

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 151 starts on January 4, 151 and ends on January 10, 151 (ISO 8601, Monday to Sunday). 151 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 151 have?

151 has 52 ISO weeks.

When does week 1 of 151 start?

Week 1 of 151 starts on January 4, 151 and ends on January 10, 151 (ISO 8601, Monday to Sunday).

When does the last week of 151 end?

Week 52 of 151 starts on December 27, 151 and ends on January 2, 152 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 156, 161, 167, 172, 178.

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.