Week numbers 1099

1099 has 52 ISO weeks. Week 1: Jan 2 – 8 · Week 52: Dec 25 – 31

1099 at a glance

Weeks in 109952
Week 1January 2, 1099 – January 8, 1099
Week 52December 25, 1099 – December 31, 1099
Days in 1099365
Leap yearNo

All Weeks in 1099

Week From To Month
Week 1 in 1099 January 2, 1099 January 8, 1099 January
Week 2 in 1099 January 9, 1099 January 15, 1099 January
Week 3 in 1099 January 16, 1099 January 22, 1099 January
Week 4 in 1099 January 23, 1099 January 29, 1099 January
Week 5 in 1099 January 30, 1099 February 5, 1099 January / February
Week 6 in 1099 February 6, 1099 February 12, 1099 February
Week 7 in 1099 February 13, 1099 February 19, 1099 February
Week 8 in 1099 February 20, 1099 February 26, 1099 February
Week 9 in 1099 February 27, 1099 March 5, 1099 February / March
Week 10 in 1099 March 6, 1099 March 12, 1099 March
Week 11 in 1099 March 13, 1099 March 19, 1099 March
Week 12 in 1099 March 20, 1099 March 26, 1099 March
Week 13 in 1099 March 27, 1099 April 2, 1099 March / April
Week 14 in 1099 April 3, 1099 April 9, 1099 April
Week 15 in 1099 April 10, 1099 April 16, 1099 April
Week 16 in 1099 April 17, 1099 April 23, 1099 April
Week 17 in 1099 April 24, 1099 April 30, 1099 April
Week 18 in 1099 May 1, 1099 May 7, 1099 May
Week 19 in 1099 May 8, 1099 May 14, 1099 May
Week 20 in 1099 May 15, 1099 May 21, 1099 May
Week 21 in 1099 May 22, 1099 May 28, 1099 May
Week 22 in 1099 May 29, 1099 June 4, 1099 May / June
Week 23 in 1099 June 5, 1099 June 11, 1099 June
Week 24 in 1099 June 12, 1099 June 18, 1099 June
Week 25 in 1099 June 19, 1099 June 25, 1099 June
Week 26 in 1099 June 26, 1099 July 2, 1099 June / July
Week 27 in 1099 July 3, 1099 July 9, 1099 July
Week 28 in 1099 July 10, 1099 July 16, 1099 July
Week 29 in 1099 July 17, 1099 July 23, 1099 July
Week 30 in 1099 July 24, 1099 July 30, 1099 July
Week 31 in 1099 July 31, 1099 August 6, 1099 July / August
Week 32 in 1099 August 7, 1099 August 13, 1099 August
Week 33 in 1099 August 14, 1099 August 20, 1099 August
Week 34 in 1099 August 21, 1099 August 27, 1099 August
Week 35 in 1099 August 28, 1099 September 3, 1099 August / September
Week 36 in 1099 September 4, 1099 September 10, 1099 September
Week 37 in 1099 September 11, 1099 September 17, 1099 September
Week 38 in 1099 September 18, 1099 September 24, 1099 September
Week 39 in 1099 September 25, 1099 October 1, 1099 September / October
Week 40 in 1099 October 2, 1099 October 8, 1099 October
Week 41 in 1099 October 9, 1099 October 15, 1099 October
Week 42 in 1099 October 16, 1099 October 22, 1099 October
Week 43 in 1099 October 23, 1099 October 29, 1099 October
Week 44 in 1099 October 30, 1099 November 5, 1099 October / November
Week 45 in 1099 November 6, 1099 November 12, 1099 November
Week 46 in 1099 November 13, 1099 November 19, 1099 November
Week 47 in 1099 November 20, 1099 November 26, 1099 November
Week 48 in 1099 November 27, 1099 December 3, 1099 November / December
Week 49 in 1099 December 4, 1099 December 10, 1099 December
Week 50 in 1099 December 11, 1099 December 17, 1099 December
Week 51 in 1099 December 18, 1099 December 24, 1099 December
Week 52 in 1099 December 25, 1099 December 31, 1099 December

Calendars 1099

January 1099
MoTuWeThFrSaSu
Week 521
Week 12345678
Week 29101112131415
Week 316171819202122
Week 423242526272829
Week 53031
February 1099
MoTuWeThFrSaSu
Week 512345
Week 66789101112
Week 713141516171819
Week 820212223242526
Week 92728
March 1099
MoTuWeThFrSaSu
Week 912345
Week 106789101112
Week 1113141516171819
Week 1220212223242526
Week 132728293031
April 1099
MoTuWeThFrSaSu
Week 1312
Week 143456789
Week 1510111213141516
Week 1617181920212223
Week 1724252627282930
May 1099
MoTuWeThFrSaSu
Week 181234567
Week 19891011121314
Week 2015161718192021
Week 2122232425262728
Week 22293031
June 1099
MoTuWeThFrSaSu
Week 221234
Week 23567891011
Week 2412131415161718
Week 2519202122232425
Week 262627282930
July 1099
MoTuWeThFrSaSu
Week 2612
Week 273456789
Week 2810111213141516
Week 2917181920212223
Week 3024252627282930
Week 3131
August 1099
MoTuWeThFrSaSu
Week 31123456
Week 3278910111213
Week 3314151617181920
Week 3421222324252627
Week 3528293031
September 1099
MoTuWeThFrSaSu
Week 35123
Week 3645678910
Week 3711121314151617
Week 3818192021222324
Week 39252627282930
October 1099
MoTuWeThFrSaSu
Week 391
Week 402345678
Week 419101112131415
Week 4216171819202122
Week 4323242526272829
Week 443031
November 1099
MoTuWeThFrSaSu
Week 4412345
Week 456789101112
Week 4613141516171819
Week 4720212223242526
Week 4827282930
December 1099
MoTuWeThFrSaSu
Week 1123
Week 4945678910
Week 5011121314151617
Week 5118192021222324
Week 5225262728293031

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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 1099 starts on January 2, 1099 and ends on January 8, 1099 (ISO 8601, Monday to Sunday). 1099 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 1099 have?

1099 has 52 ISO weeks.

When does week 1 of 1099 start?

Week 1 of 1099 starts on January 2, 1099 and ends on January 8, 1099 (ISO 8601, Monday to Sunday).

When does the last week of 1099 end?

Week 52 of 1099 starts on December 25, 1099 and ends on December 31, 1099 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 1103, 1108, 1114, 1120, 1125.

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.