Week numbers 9660

9660 has 53 ISO weeks, because 1 January 9660 falls on a Thursday. Week 1: Dec 29, 9659 – Jan 4, 9660 · Week 53: Dec 27, 9660 – Jan 2, 9661

9660 at a glance

Weeks in 966053
Week 1December 29, 9659 – January 4, 9660
Week 53December 27, 9660 – January 2, 9661
Days in 9660366
Leap yearYes

All Weeks in 9660

Week From To Month
Week 1 in 9660 December 29, 9659 January 4, 9660 December / January
Week 2 in 9660 January 5, 9660 January 11, 9660 January
Week 3 in 9660 January 12, 9660 January 18, 9660 January
Week 4 in 9660 January 19, 9660 January 25, 9660 January
Week 5 in 9660 January 26, 9660 February 1, 9660 January / February
Week 6 in 9660 February 2, 9660 February 8, 9660 February
Week 7 in 9660 February 9, 9660 February 15, 9660 February
Week 8 in 9660 February 16, 9660 February 22, 9660 February
Week 9 in 9660 February 23, 9660 February 29, 9660 February
Week 10 in 9660 March 1, 9660 March 7, 9660 March
Week 11 in 9660 March 8, 9660 March 14, 9660 March
Week 12 in 9660 March 15, 9660 March 21, 9660 March
Week 13 in 9660 March 22, 9660 March 28, 9660 March
Week 14 in 9660 March 29, 9660 April 4, 9660 March / April
Week 15 in 9660 April 5, 9660 April 11, 9660 April
Week 16 in 9660 April 12, 9660 April 18, 9660 April
Week 17 in 9660 April 19, 9660 April 25, 9660 April
Week 18 in 9660 April 26, 9660 May 2, 9660 April / May
Week 19 in 9660 May 3, 9660 May 9, 9660 May
Week 20 in 9660 May 10, 9660 May 16, 9660 May
Week 21 in 9660 May 17, 9660 May 23, 9660 May
Week 22 in 9660 May 24, 9660 May 30, 9660 May
Week 23 in 9660 May 31, 9660 June 6, 9660 May / June
Week 24 in 9660 June 7, 9660 June 13, 9660 June
Week 25 in 9660 June 14, 9660 June 20, 9660 June
Week 26 in 9660 June 21, 9660 June 27, 9660 June
Week 27 in 9660 June 28, 9660 July 4, 9660 June / July
Week 28 in 9660 July 5, 9660 July 11, 9660 July
Week 29 in 9660 July 12, 9660 July 18, 9660 July
Week 30 in 9660 July 19, 9660 July 25, 9660 July
Week 31 in 9660 July 26, 9660 August 1, 9660 July / August
Week 32 in 9660 August 2, 9660 August 8, 9660 August
Week 33 in 9660 August 9, 9660 August 15, 9660 August
Week 34 in 9660 August 16, 9660 August 22, 9660 August
Week 35 in 9660 August 23, 9660 August 29, 9660 August
Week 36 in 9660 August 30, 9660 September 5, 9660 August / September
Week 37 in 9660 September 6, 9660 September 12, 9660 September
Week 38 in 9660 September 13, 9660 September 19, 9660 September
Week 39 in 9660 September 20, 9660 September 26, 9660 September
Week 40 in 9660 September 27, 9660 October 3, 9660 September / October
Week 41 in 9660 October 4, 9660 October 10, 9660 October
Week 42 in 9660 October 11, 9660 October 17, 9660 October
Week 43 in 9660 October 18, 9660 October 24, 9660 October
Week 44 in 9660 October 25, 9660 October 31, 9660 October
Week 45 in 9660 November 1, 9660 November 7, 9660 November
Week 46 in 9660 November 8, 9660 November 14, 9660 November
Week 47 in 9660 November 15, 9660 November 21, 9660 November
Week 48 in 9660 November 22, 9660 November 28, 9660 November
Week 49 in 9660 November 29, 9660 December 5, 9660 November / December
Week 50 in 9660 December 6, 9660 December 12, 9660 December
Week 51 in 9660 December 13, 9660 December 19, 9660 December
Week 52 in 9660 December 20, 9660 December 26, 9660 December
Week 53 in 9660 December 27, 9660 January 2, 9661 December / January

Calendars 9660

January 9660
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 9660
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 923242526272829
March 9660
MoTuWeThFrSaSu
Week 101234567
Week 11891011121314
Week 1215161718192021
Week 1322232425262728
Week 14293031
April 9660
MoTuWeThFrSaSu
Week 141234
Week 15567891011
Week 1612131415161718
Week 1719202122232425
Week 182627282930
May 9660
MoTuWeThFrSaSu
Week 1812
Week 193456789
Week 2010111213141516
Week 2117181920212223
Week 2224252627282930
Week 2331
June 9660
MoTuWeThFrSaSu
Week 23123456
Week 2478910111213
Week 2514151617181920
Week 2621222324252627
Week 27282930
July 9660
MoTuWeThFrSaSu
Week 271234
Week 28567891011
Week 2912131415161718
Week 3019202122232425
Week 31262728293031
August 9660
MoTuWeThFrSaSu
Week 311
Week 322345678
Week 339101112131415
Week 3416171819202122
Week 3523242526272829
Week 363031
September 9660
MoTuWeThFrSaSu
Week 3612345
Week 376789101112
Week 3813141516171819
Week 3920212223242526
Week 4027282930
October 9660
MoTuWeThFrSaSu
Week 40123
Week 4145678910
Week 4211121314151617
Week 4318192021222324
Week 4425262728293031
November 9660
MoTuWeThFrSaSu
Week 451234567
Week 46891011121314
Week 4715161718192021
Week 4822232425262728
Week 492930
December 9660
MoTuWeThFrSaSu
Week 212345
Week 506789101112
Week 5113141516171819
Week 5220212223242526
Week 532728293031

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 9660 starts on December 29, 9659 and ends on January 4, 9660 (ISO 8601, Monday to Sunday). 9660 has 53 ISO weeks, because 1 January 9660 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 9660 have?

9660 has 53 ISO weeks, because 1 January 9660 falls on a Thursday.

When does week 1 of 9660 start?

Week 1 of 9660 starts on December 29, 9659 and ends on January 4, 9660 (ISO 8601, Monday to Sunday).

When does the last week of 9660 end?

Week 53 of 9660 starts on December 27, 9660 and ends on January 2, 9661 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 9660, 9665, 9671, 9676, 9682.

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.