Week numbers 9001

9001 has 53 ISO weeks, because 1 January 9001 falls on a Thursday. Week 1: Dec 29, 9000 – Jan 4, 9001 · Week 53: Dec 28, 9001 – Jan 3, 9002

9001 at a glance

Weeks in 900153
Week 1December 29, 9000 – January 4, 9001
Week 53December 28, 9001 – January 3, 9002
Days in 9001365
Leap yearNo

All Weeks in 9001

Week From To Month
Week 1 in 9001 December 29, 9000 January 4, 9001 December / January
Week 2 in 9001 January 5, 9001 January 11, 9001 January
Week 3 in 9001 January 12, 9001 January 18, 9001 January
Week 4 in 9001 January 19, 9001 January 25, 9001 January
Week 5 in 9001 January 26, 9001 February 1, 9001 January / February
Week 6 in 9001 February 2, 9001 February 8, 9001 February
Week 7 in 9001 February 9, 9001 February 15, 9001 February
Week 8 in 9001 February 16, 9001 February 22, 9001 February
Week 9 in 9001 February 23, 9001 March 1, 9001 February / March
Week 10 in 9001 March 2, 9001 March 8, 9001 March
Week 11 in 9001 March 9, 9001 March 15, 9001 March
Week 12 in 9001 March 16, 9001 March 22, 9001 March
Week 13 in 9001 March 23, 9001 March 29, 9001 March
Week 14 in 9001 March 30, 9001 April 5, 9001 March / April
Week 15 in 9001 April 6, 9001 April 12, 9001 April
Week 16 in 9001 April 13, 9001 April 19, 9001 April
Week 17 in 9001 April 20, 9001 April 26, 9001 April
Week 18 in 9001 April 27, 9001 May 3, 9001 April / May
Week 19 in 9001 May 4, 9001 May 10, 9001 May
Week 20 in 9001 May 11, 9001 May 17, 9001 May
Week 21 in 9001 May 18, 9001 May 24, 9001 May
Week 22 in 9001 May 25, 9001 May 31, 9001 May
Week 23 in 9001 June 1, 9001 June 7, 9001 June
Week 24 in 9001 June 8, 9001 June 14, 9001 June
Week 25 in 9001 June 15, 9001 June 21, 9001 June
Week 26 in 9001 June 22, 9001 June 28, 9001 June
Week 27 in 9001 June 29, 9001 July 5, 9001 June / July
Week 28 in 9001 July 6, 9001 July 12, 9001 July
Week 29 in 9001 July 13, 9001 July 19, 9001 July
Week 30 in 9001 July 20, 9001 July 26, 9001 July
Week 31 in 9001 July 27, 9001 August 2, 9001 July / August
Week 32 in 9001 August 3, 9001 August 9, 9001 August
Week 33 in 9001 August 10, 9001 August 16, 9001 August
Week 34 in 9001 August 17, 9001 August 23, 9001 August
Week 35 in 9001 August 24, 9001 August 30, 9001 August
Week 36 in 9001 August 31, 9001 September 6, 9001 August / September
Week 37 in 9001 September 7, 9001 September 13, 9001 September
Week 38 in 9001 September 14, 9001 September 20, 9001 September
Week 39 in 9001 September 21, 9001 September 27, 9001 September
Week 40 in 9001 September 28, 9001 October 4, 9001 September / October
Week 41 in 9001 October 5, 9001 October 11, 9001 October
Week 42 in 9001 October 12, 9001 October 18, 9001 October
Week 43 in 9001 October 19, 9001 October 25, 9001 October
Week 44 in 9001 October 26, 9001 November 1, 9001 October / November
Week 45 in 9001 November 2, 9001 November 8, 9001 November
Week 46 in 9001 November 9, 9001 November 15, 9001 November
Week 47 in 9001 November 16, 9001 November 22, 9001 November
Week 48 in 9001 November 23, 9001 November 29, 9001 November
Week 49 in 9001 November 30, 9001 December 6, 9001 November / December
Week 50 in 9001 December 7, 9001 December 13, 9001 December
Week 51 in 9001 December 14, 9001 December 20, 9001 December
Week 52 in 9001 December 21, 9001 December 27, 9001 December
Week 53 in 9001 December 28, 9001 January 3, 9002 December / January

Calendars 9001

January 9001
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 9001
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 9232425262728
March 9001
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 9001
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 9001
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 9001
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 9001
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 9001
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 9001
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 9001
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 9001
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 9001
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 9001 starts on December 29, 9000 and ends on January 4, 9001 (ISO 8601, Monday to Sunday). 9001 has 53 ISO weeks, because 1 January 9001 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 9001 have?

9001 has 53 ISO weeks, because 1 January 9001 falls on a Thursday.

When does week 1 of 9001 start?

Week 1 of 9001 starts on December 29, 9000 and ends on January 4, 9001 (ISO 8601, Monday to Sunday).

When does the last week of 9001 end?

Week 53 of 9001 starts on December 28, 9001 and ends on January 3, 9002 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 9001, 9007, 9012, 9018, 9024.

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.