Week numbers 139

139 has 53 ISO weeks, because 1 January 139 falls on a Thursday. Week 1: Dec 29, 138 – Jan 4, 139 · Week 53: Dec 28, 139 – Jan 3, 140

139 at a glance

Weeks in 13953
Week 1December 29, 138 – January 4, 139
Week 53December 28, 139 – January 3, 140
Days in 139365
Leap yearNo

All Weeks in 139

Week From To Month
Week 1 in 139 December 29, 138 January 4, 139 December / January
Week 2 in 139 January 5, 139 January 11, 139 January
Week 3 in 139 January 12, 139 January 18, 139 January
Week 4 in 139 January 19, 139 January 25, 139 January
Week 5 in 139 January 26, 139 February 1, 139 January / February
Week 6 in 139 February 2, 139 February 8, 139 February
Week 7 in 139 February 9, 139 February 15, 139 February
Week 8 in 139 February 16, 139 February 22, 139 February
Week 9 in 139 February 23, 139 March 1, 139 February / March
Week 10 in 139 March 2, 139 March 8, 139 March
Week 11 in 139 March 9, 139 March 15, 139 March
Week 12 in 139 March 16, 139 March 22, 139 March
Week 13 in 139 March 23, 139 March 29, 139 March
Week 14 in 139 March 30, 139 April 5, 139 March / April
Week 15 in 139 April 6, 139 April 12, 139 April
Week 16 in 139 April 13, 139 April 19, 139 April
Week 17 in 139 April 20, 139 April 26, 139 April
Week 18 in 139 April 27, 139 May 3, 139 April / May
Week 19 in 139 May 4, 139 May 10, 139 May
Week 20 in 139 May 11, 139 May 17, 139 May
Week 21 in 139 May 18, 139 May 24, 139 May
Week 22 in 139 May 25, 139 May 31, 139 May
Week 23 in 139 June 1, 139 June 7, 139 June
Week 24 in 139 June 8, 139 June 14, 139 June
Week 25 in 139 June 15, 139 June 21, 139 June
Week 26 in 139 June 22, 139 June 28, 139 June
Week 27 in 139 June 29, 139 July 5, 139 June / July
Week 28 in 139 July 6, 139 July 12, 139 July
Week 29 in 139 July 13, 139 July 19, 139 July
Week 30 in 139 July 20, 139 July 26, 139 July
Week 31 in 139 July 27, 139 August 2, 139 July / August
Week 32 in 139 August 3, 139 August 9, 139 August
Week 33 in 139 August 10, 139 August 16, 139 August
Week 34 in 139 August 17, 139 August 23, 139 August
Week 35 in 139 August 24, 139 August 30, 139 August
Week 36 in 139 August 31, 139 September 6, 139 August / September
Week 37 in 139 September 7, 139 September 13, 139 September
Week 38 in 139 September 14, 139 September 20, 139 September
Week 39 in 139 September 21, 139 September 27, 139 September
Week 40 in 139 September 28, 139 October 4, 139 September / October
Week 41 in 139 October 5, 139 October 11, 139 October
Week 42 in 139 October 12, 139 October 18, 139 October
Week 43 in 139 October 19, 139 October 25, 139 October
Week 44 in 139 October 26, 139 November 1, 139 October / November
Week 45 in 139 November 2, 139 November 8, 139 November
Week 46 in 139 November 9, 139 November 15, 139 November
Week 47 in 139 November 16, 139 November 22, 139 November
Week 48 in 139 November 23, 139 November 29, 139 November
Week 49 in 139 November 30, 139 December 6, 139 November / December
Week 50 in 139 December 7, 139 December 13, 139 December
Week 51 in 139 December 14, 139 December 20, 139 December
Week 52 in 139 December 21, 139 December 27, 139 December
Week 53 in 139 December 28, 139 January 3, 140 December / January

Calendars 139

January 139
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 139
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 9232425262728
March 139
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 139
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 139
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 139
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 139
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 139
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 139
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 139
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 139
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 139
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 139 starts on December 29, 138 and ends on January 4, 139 (ISO 8601, Monday to Sunday). 139 has 53 ISO weeks, because 1 January 139 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 139 have?

139 has 53 ISO weeks, because 1 January 139 falls on a Thursday.

When does week 1 of 139 start?

Week 1 of 139 starts on December 29, 138 and ends on January 4, 139 (ISO 8601, Monday to Sunday).

When does the last week of 139 end?

Week 53 of 139 starts on December 28, 139 and ends on January 3, 140 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 139, 144, 150, 156, 161.

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.