Week numbers 5580

5580 has 52 ISO weeks. Week 1: Dec 31, 5579 – Jan 6, 5580 · Week 52: Dec 22 – 28

5580 at a glance

Weeks in 558052
Week 1December 31, 5579 – January 6, 5580
Week 52December 22, 5580 – December 28, 5580
Days in 5580366
Leap yearYes

All Weeks in 5580

Week From To Month
Week 1 in 5580 December 31, 5579 January 6, 5580 December / January
Week 2 in 5580 January 7, 5580 January 13, 5580 January
Week 3 in 5580 January 14, 5580 January 20, 5580 January
Week 4 in 5580 January 21, 5580 January 27, 5580 January
Week 5 in 5580 January 28, 5580 February 3, 5580 January / February
Week 6 in 5580 February 4, 5580 February 10, 5580 February
Week 7 in 5580 February 11, 5580 February 17, 5580 February
Week 8 in 5580 February 18, 5580 February 24, 5580 February
Week 9 in 5580 February 25, 5580 March 2, 5580 February / March
Week 10 in 5580 March 3, 5580 March 9, 5580 March
Week 11 in 5580 March 10, 5580 March 16, 5580 March
Week 12 in 5580 March 17, 5580 March 23, 5580 March
Week 13 in 5580 March 24, 5580 March 30, 5580 March
Week 14 in 5580 March 31, 5580 April 6, 5580 March / April
Week 15 in 5580 April 7, 5580 April 13, 5580 April
Week 16 in 5580 April 14, 5580 April 20, 5580 April
Week 17 in 5580 April 21, 5580 April 27, 5580 April
Week 18 in 5580 April 28, 5580 May 4, 5580 April / May
Week 19 in 5580 May 5, 5580 May 11, 5580 May
Week 20 in 5580 May 12, 5580 May 18, 5580 May
Week 21 in 5580 May 19, 5580 May 25, 5580 May
Week 22 in 5580 May 26, 5580 June 1, 5580 May / June
Week 23 in 5580 June 2, 5580 June 8, 5580 June
Week 24 in 5580 June 9, 5580 June 15, 5580 June
Week 25 in 5580 June 16, 5580 June 22, 5580 June
Week 26 in 5580 June 23, 5580 June 29, 5580 June
Week 27 in 5580 June 30, 5580 July 6, 5580 June / July
Week 28 in 5580 July 7, 5580 July 13, 5580 July
Week 29 in 5580 July 14, 5580 July 20, 5580 July
Week 30 in 5580 July 21, 5580 July 27, 5580 July
Week 31 in 5580 July 28, 5580 August 3, 5580 July / August
Week 32 in 5580 August 4, 5580 August 10, 5580 August
Week 33 in 5580 August 11, 5580 August 17, 5580 August
Week 34 in 5580 August 18, 5580 August 24, 5580 August
Week 35 in 5580 August 25, 5580 August 31, 5580 August
Week 36 in 5580 September 1, 5580 September 7, 5580 September
Week 37 in 5580 September 8, 5580 September 14, 5580 September
Week 38 in 5580 September 15, 5580 September 21, 5580 September
Week 39 in 5580 September 22, 5580 September 28, 5580 September
Week 40 in 5580 September 29, 5580 October 5, 5580 September / October
Week 41 in 5580 October 6, 5580 October 12, 5580 October
Week 42 in 5580 October 13, 5580 October 19, 5580 October
Week 43 in 5580 October 20, 5580 October 26, 5580 October
Week 44 in 5580 October 27, 5580 November 2, 5580 October / November
Week 45 in 5580 November 3, 5580 November 9, 5580 November
Week 46 in 5580 November 10, 5580 November 16, 5580 November
Week 47 in 5580 November 17, 5580 November 23, 5580 November
Week 48 in 5580 November 24, 5580 November 30, 5580 November
Week 49 in 5580 December 1, 5580 December 7, 5580 December
Week 50 in 5580 December 8, 5580 December 14, 5580 December
Week 51 in 5580 December 15, 5580 December 21, 5580 December
Week 52 in 5580 December 22, 5580 December 28, 5580 December

Calendars 5580

January 5580
MoTuWeThFrSaSu
Week 1123456
Week 278910111213
Week 314151617181920
Week 421222324252627
Week 528293031
February 5580
MoTuWeThFrSaSu
Week 5123
Week 645678910
Week 711121314151617
Week 818192021222324
Week 92526272829
March 5580
MoTuWeThFrSaSu
Week 912
Week 103456789
Week 1110111213141516
Week 1217181920212223
Week 1324252627282930
Week 1431
April 5580
MoTuWeThFrSaSu
Week 14123456
Week 1578910111213
Week 1614151617181920
Week 1721222324252627
Week 18282930
May 5580
MoTuWeThFrSaSu
Week 181234
Week 19567891011
Week 2012131415161718
Week 2119202122232425
Week 22262728293031
June 5580
MoTuWeThFrSaSu
Week 221
Week 232345678
Week 249101112131415
Week 2516171819202122
Week 2623242526272829
Week 2730
July 5580
MoTuWeThFrSaSu
Week 27123456
Week 2878910111213
Week 2914151617181920
Week 3021222324252627
Week 3128293031
August 5580
MoTuWeThFrSaSu
Week 31123
Week 3245678910
Week 3311121314151617
Week 3418192021222324
Week 3525262728293031
September 5580
MoTuWeThFrSaSu
Week 361234567
Week 37891011121314
Week 3815161718192021
Week 3922232425262728
Week 402930
October 5580
MoTuWeThFrSaSu
Week 4012345
Week 416789101112
Week 4213141516171819
Week 4320212223242526
Week 442728293031
November 5580
MoTuWeThFrSaSu
Week 4412
Week 453456789
Week 4610111213141516
Week 4717181920212223
Week 4824252627282930
December 5580
MoTuWeThFrSaSu
Week 491234567
Week 50891011121314
Week 5115161718192021
Week 5222232425262728
Week 1293031

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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 5580 starts on December 31, 5579 and ends on January 6, 5580 (ISO 8601, Monday to Sunday). 5580 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 5580 have?

5580 has 52 ISO weeks.

When does week 1 of 5580 start?

Week 1 of 5580 starts on December 31, 5579 and ends on January 6, 5580 (ISO 8601, Monday to Sunday).

When does the last week of 5580 end?

Week 52 of 5580 starts on December 22, 5580 and ends on December 28, 5580 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 5581, 5587, 5592, 5598, 5604.

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.