Week numbers 871

871 has 53 ISO weeks, because 1 January 871 falls on a Thursday. Week 1: Dec 29, 870 – Jan 4, 871 · Week 53: Dec 28, 871 – Jan 3, 872

871 at a glance

Weeks in 87153
Week 1December 29, 870 – January 4, 871
Week 53December 28, 871 – January 3, 872
Days in 871365
Leap yearNo

All Weeks in 871

Week From To Month
Week 1 in 871 December 29, 870 January 4, 871 December / January
Week 2 in 871 January 5, 871 January 11, 871 January
Week 3 in 871 January 12, 871 January 18, 871 January
Week 4 in 871 January 19, 871 January 25, 871 January
Week 5 in 871 January 26, 871 February 1, 871 January / February
Week 6 in 871 February 2, 871 February 8, 871 February
Week 7 in 871 February 9, 871 February 15, 871 February
Week 8 in 871 February 16, 871 February 22, 871 February
Week 9 in 871 February 23, 871 March 1, 871 February / March
Week 10 in 871 March 2, 871 March 8, 871 March
Week 11 in 871 March 9, 871 March 15, 871 March
Week 12 in 871 March 16, 871 March 22, 871 March
Week 13 in 871 March 23, 871 March 29, 871 March
Week 14 in 871 March 30, 871 April 5, 871 March / April
Week 15 in 871 April 6, 871 April 12, 871 April
Week 16 in 871 April 13, 871 April 19, 871 April
Week 17 in 871 April 20, 871 April 26, 871 April
Week 18 in 871 April 27, 871 May 3, 871 April / May
Week 19 in 871 May 4, 871 May 10, 871 May
Week 20 in 871 May 11, 871 May 17, 871 May
Week 21 in 871 May 18, 871 May 24, 871 May
Week 22 in 871 May 25, 871 May 31, 871 May
Week 23 in 871 June 1, 871 June 7, 871 June
Week 24 in 871 June 8, 871 June 14, 871 June
Week 25 in 871 June 15, 871 June 21, 871 June
Week 26 in 871 June 22, 871 June 28, 871 June
Week 27 in 871 June 29, 871 July 5, 871 June / July
Week 28 in 871 July 6, 871 July 12, 871 July
Week 29 in 871 July 13, 871 July 19, 871 July
Week 30 in 871 July 20, 871 July 26, 871 July
Week 31 in 871 July 27, 871 August 2, 871 July / August
Week 32 in 871 August 3, 871 August 9, 871 August
Week 33 in 871 August 10, 871 August 16, 871 August
Week 34 in 871 August 17, 871 August 23, 871 August
Week 35 in 871 August 24, 871 August 30, 871 August
Week 36 in 871 August 31, 871 September 6, 871 August / September
Week 37 in 871 September 7, 871 September 13, 871 September
Week 38 in 871 September 14, 871 September 20, 871 September
Week 39 in 871 September 21, 871 September 27, 871 September
Week 40 in 871 September 28, 871 October 4, 871 September / October
Week 41 in 871 October 5, 871 October 11, 871 October
Week 42 in 871 October 12, 871 October 18, 871 October
Week 43 in 871 October 19, 871 October 25, 871 October
Week 44 in 871 October 26, 871 November 1, 871 October / November
Week 45 in 871 November 2, 871 November 8, 871 November
Week 46 in 871 November 9, 871 November 15, 871 November
Week 47 in 871 November 16, 871 November 22, 871 November
Week 48 in 871 November 23, 871 November 29, 871 November
Week 49 in 871 November 30, 871 December 6, 871 November / December
Week 50 in 871 December 7, 871 December 13, 871 December
Week 51 in 871 December 14, 871 December 20, 871 December
Week 52 in 871 December 21, 871 December 27, 871 December
Week 53 in 871 December 28, 871 January 3, 872 December / January

Calendars 871

January 871
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 871
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 9232425262728
March 871
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 871
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 871
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 871
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 871
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 871
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 871
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 871
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 871
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 871
MoTuWeThFrSaSu
Week 2123456
Week 5078910111213
Week 5114151617181920
Week 5221222324252627
Week 5328293031

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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 871 starts on December 29, 870 and ends on January 4, 871 (ISO 8601, Monday to Sunday). 871 has 53 ISO weeks, because 1 January 871 falls on a Thursday.

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 871 have?

871 has 53 ISO weeks, because 1 January 871 falls on a Thursday.

When does week 1 of 871 start?

Week 1 of 871 starts on December 29, 870 and ends on January 4, 871 (ISO 8601, Monday to Sunday).

When does the last week of 871 end?

Week 53 of 871 starts on December 28, 871 and ends on January 3, 872 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 871, 876, 882, 888, 893.

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.