Week numbers 901

901 has 52 ISO weeks. Week 1: Jan 3 – 9 · Week 52: Dec 26, 901 – Jan 1, 902

901 at a glance

Weeks in 90152
Week 1January 3, 901 – January 9, 901
Week 52December 26, 901 – January 1, 902
Days in 901365
Leap yearNo

All Weeks in 901

Week From To Month
Week 1 in 901 January 3, 901 January 9, 901 January
Week 2 in 901 January 10, 901 January 16, 901 January
Week 3 in 901 January 17, 901 January 23, 901 January
Week 4 in 901 January 24, 901 January 30, 901 January
Week 5 in 901 January 31, 901 February 6, 901 January / February
Week 6 in 901 February 7, 901 February 13, 901 February
Week 7 in 901 February 14, 901 February 20, 901 February
Week 8 in 901 February 21, 901 February 27, 901 February
Week 9 in 901 February 28, 901 March 6, 901 February / March
Week 10 in 901 March 7, 901 March 13, 901 March
Week 11 in 901 March 14, 901 March 20, 901 March
Week 12 in 901 March 21, 901 March 27, 901 March
Week 13 in 901 March 28, 901 April 3, 901 March / April
Week 14 in 901 April 4, 901 April 10, 901 April
Week 15 in 901 April 11, 901 April 17, 901 April
Week 16 in 901 April 18, 901 April 24, 901 April
Week 17 in 901 April 25, 901 May 1, 901 April / May
Week 18 in 901 May 2, 901 May 8, 901 May
Week 19 in 901 May 9, 901 May 15, 901 May
Week 20 in 901 May 16, 901 May 22, 901 May
Week 21 in 901 May 23, 901 May 29, 901 May
Week 22 in 901 May 30, 901 June 5, 901 May / June
Week 23 in 901 June 6, 901 June 12, 901 June
Week 24 in 901 June 13, 901 June 19, 901 June
Week 25 in 901 June 20, 901 June 26, 901 June
Week 26 in 901 June 27, 901 July 3, 901 June / July
Week 27 in 901 July 4, 901 July 10, 901 July
Week 28 in 901 July 11, 901 July 17, 901 July
Week 29 in 901 July 18, 901 July 24, 901 July
Week 30 in 901 July 25, 901 July 31, 901 July
Week 31 in 901 August 1, 901 August 7, 901 August
Week 32 in 901 August 8, 901 August 14, 901 August
Week 33 in 901 August 15, 901 August 21, 901 August
Week 34 in 901 August 22, 901 August 28, 901 August
Week 35 in 901 August 29, 901 September 4, 901 August / September
Week 36 in 901 September 5, 901 September 11, 901 September
Week 37 in 901 September 12, 901 September 18, 901 September
Week 38 in 901 September 19, 901 September 25, 901 September
Week 39 in 901 September 26, 901 October 2, 901 September / October
Week 40 in 901 October 3, 901 October 9, 901 October
Week 41 in 901 October 10, 901 October 16, 901 October
Week 42 in 901 October 17, 901 October 23, 901 October
Week 43 in 901 October 24, 901 October 30, 901 October
Week 44 in 901 October 31, 901 November 6, 901 October / November
Week 45 in 901 November 7, 901 November 13, 901 November
Week 46 in 901 November 14, 901 November 20, 901 November
Week 47 in 901 November 21, 901 November 27, 901 November
Week 48 in 901 November 28, 901 December 4, 901 November / December
Week 49 in 901 December 5, 901 December 11, 901 December
Week 50 in 901 December 12, 901 December 18, 901 December
Week 51 in 901 December 19, 901 December 25, 901 December
Week 52 in 901 December 26, 901 January 1, 902 December / January

Calendars 901

January 901
MoTuWeThFrSaSu
Week 5212
Week 13456789
Week 210111213141516
Week 317181920212223
Week 424252627282930
Week 531
February 901
MoTuWeThFrSaSu
Week 5123456
Week 678910111213
Week 714151617181920
Week 821222324252627
Week 928
March 901
MoTuWeThFrSaSu
Week 9123456
Week 1078910111213
Week 1114151617181920
Week 1221222324252627
Week 1328293031
April 901
MoTuWeThFrSaSu
Week 13123
Week 1445678910
Week 1511121314151617
Week 1618192021222324
Week 17252627282930
May 901
MoTuWeThFrSaSu
Week 171
Week 182345678
Week 199101112131415
Week 2016171819202122
Week 2123242526272829
Week 223031
June 901
MoTuWeThFrSaSu
Week 2212345
Week 236789101112
Week 2413141516171819
Week 2520212223242526
Week 2627282930
July 901
MoTuWeThFrSaSu
Week 26123
Week 2745678910
Week 2811121314151617
Week 2918192021222324
Week 3025262728293031
August 901
MoTuWeThFrSaSu
Week 311234567
Week 32891011121314
Week 3315161718192021
Week 3422232425262728
Week 35293031
September 901
MoTuWeThFrSaSu
Week 351234
Week 36567891011
Week 3712131415161718
Week 3819202122232425
Week 392627282930
October 901
MoTuWeThFrSaSu
Week 3912
Week 403456789
Week 4110111213141516
Week 4217181920212223
Week 4324252627282930
Week 4431
November 901
MoTuWeThFrSaSu
Week 44123456
Week 4578910111213
Week 4614151617181920
Week 4721222324252627
Week 48282930
December 901
MoTuWeThFrSaSu
Week 11234
Week 49567891011
Week 5012131415161718
Week 5119202122232425
Week 52262728293031

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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 901 starts on January 3, 901 and ends on January 9, 901 (ISO 8601, Monday to Sunday). 901 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 901 have?

901 has 52 ISO weeks.

When does week 1 of 901 start?

Week 1 of 901 starts on January 3, 901 and ends on January 9, 901 (ISO 8601, Monday to Sunday).

When does the last week of 901 end?

Week 52 of 901 starts on December 26, 901 and ends on January 1, 902 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 905, 911, 916, 922, 928.

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.