Week numbers 87

87 has 52 ISO weeks. Week 1: Dec 30, 86 – Jan 5, 87 · Week 52: Dec 22 – 28

87 at a glance

Weeks in 8752
Week 1December 30, 86 – January 5, 87
Week 52December 22, 87 – December 28, 87
Days in 87365
Leap yearNo

All Weeks in 87

Week From To Month
Week 1 in 87 December 30, 86 January 5, 87 December / January
Week 2 in 87 January 6, 87 January 12, 87 January
Week 3 in 87 January 13, 87 January 19, 87 January
Week 4 in 87 January 20, 87 January 26, 87 January
Week 5 in 87 January 27, 87 February 2, 87 January / February
Week 6 in 87 February 3, 87 February 9, 87 February
Week 7 in 87 February 10, 87 February 16, 87 February
Week 8 in 87 February 17, 87 February 23, 87 February
Week 9 in 87 February 24, 87 March 2, 87 February / March
Week 10 in 87 March 3, 87 March 9, 87 March
Week 11 in 87 March 10, 87 March 16, 87 March
Week 12 in 87 March 17, 87 March 23, 87 March
Week 13 in 87 March 24, 87 March 30, 87 March
Week 14 in 87 March 31, 87 April 6, 87 March / April
Week 15 in 87 April 7, 87 April 13, 87 April
Week 16 in 87 April 14, 87 April 20, 87 April
Week 17 in 87 April 21, 87 April 27, 87 April
Week 18 in 87 April 28, 87 May 4, 87 April / May
Week 19 in 87 May 5, 87 May 11, 87 May
Week 20 in 87 May 12, 87 May 18, 87 May
Week 21 in 87 May 19, 87 May 25, 87 May
Week 22 in 87 May 26, 87 June 1, 87 May / June
Week 23 in 87 June 2, 87 June 8, 87 June
Week 24 in 87 June 9, 87 June 15, 87 June
Week 25 in 87 June 16, 87 June 22, 87 June
Week 26 in 87 June 23, 87 June 29, 87 June
Week 27 in 87 June 30, 87 July 6, 87 June / July
Week 28 in 87 July 7, 87 July 13, 87 July
Week 29 in 87 July 14, 87 July 20, 87 July
Week 30 in 87 July 21, 87 July 27, 87 July
Week 31 in 87 July 28, 87 August 3, 87 July / August
Week 32 in 87 August 4, 87 August 10, 87 August
Week 33 in 87 August 11, 87 August 17, 87 August
Week 34 in 87 August 18, 87 August 24, 87 August
Week 35 in 87 August 25, 87 August 31, 87 August
Week 36 in 87 September 1, 87 September 7, 87 September
Week 37 in 87 September 8, 87 September 14, 87 September
Week 38 in 87 September 15, 87 September 21, 87 September
Week 39 in 87 September 22, 87 September 28, 87 September
Week 40 in 87 September 29, 87 October 5, 87 September / October
Week 41 in 87 October 6, 87 October 12, 87 October
Week 42 in 87 October 13, 87 October 19, 87 October
Week 43 in 87 October 20, 87 October 26, 87 October
Week 44 in 87 October 27, 87 November 2, 87 October / November
Week 45 in 87 November 3, 87 November 9, 87 November
Week 46 in 87 November 10, 87 November 16, 87 November
Week 47 in 87 November 17, 87 November 23, 87 November
Week 48 in 87 November 24, 87 November 30, 87 November
Week 49 in 87 December 1, 87 December 7, 87 December
Week 50 in 87 December 8, 87 December 14, 87 December
Week 51 in 87 December 15, 87 December 21, 87 December
Week 52 in 87 December 22, 87 December 28, 87 December

Calendars 87

January 87
MoTuWeThFrSaSu
Week 112345
Week 26789101112
Week 313141516171819
Week 420212223242526
Week 52728293031
February 87
MoTuWeThFrSaSu
Week 512
Week 63456789
Week 710111213141516
Week 817181920212223
Week 92425262728
March 87
MoTuWeThFrSaSu
Week 912
Week 103456789
Week 1110111213141516
Week 1217181920212223
Week 1324252627282930
Week 1431
April 87
MoTuWeThFrSaSu
Week 14123456
Week 1578910111213
Week 1614151617181920
Week 1721222324252627
Week 18282930
May 87
MoTuWeThFrSaSu
Week 181234
Week 19567891011
Week 2012131415161718
Week 2119202122232425
Week 22262728293031
June 87
MoTuWeThFrSaSu
Week 221
Week 232345678
Week 249101112131415
Week 2516171819202122
Week 2623242526272829
Week 2730
July 87
MoTuWeThFrSaSu
Week 27123456
Week 2878910111213
Week 2914151617181920
Week 3021222324252627
Week 3128293031
August 87
MoTuWeThFrSaSu
Week 31123
Week 3245678910
Week 3311121314151617
Week 3418192021222324
Week 3525262728293031
September 87
MoTuWeThFrSaSu
Week 361234567
Week 37891011121314
Week 3815161718192021
Week 3922232425262728
Week 402930
October 87
MoTuWeThFrSaSu
Week 4012345
Week 416789101112
Week 4213141516171819
Week 4320212223242526
Week 442728293031
November 87
MoTuWeThFrSaSu
Week 4412
Week 453456789
Week 4610111213141516
Week 4717181920212223
Week 4824252627282930
December 87
MoTuWeThFrSaSu
Week 491234567
Week 50891011121314
Week 5115161718192021
Week 5222232425262728
Week 1293031

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 87 starts on December 30, 86 and ends on January 5, 87 (ISO 8601, Monday to Sunday). 87 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 87 have?

87 has 52 ISO weeks.

When does week 1 of 87 start?

Week 1 of 87 starts on December 30, 86 and ends on January 5, 87 (ISO 8601, Monday to Sunday).

When does the last week of 87 end?

Week 52 of 87 starts on December 22, 87 and ends on December 28, 87 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 88, 93, 99, 105, 111.

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.