Week numbers 105

105 has 53 ISO weeks, because 1 January 105 falls on a Thursday. Week 1: Dec 29, 104 – Jan 4, 105 · Week 53: Dec 28, 105 – Jan 3, 106

105 at a glance

Weeks in 10553
Week 1December 29, 104 – January 4, 105
Week 53December 28, 105 – January 3, 106
Days in 105365
Leap yearNo

All Weeks in 105

Week From To Month
Week 1 in 105 December 29, 104 January 4, 105 December / January
Week 2 in 105 January 5, 105 January 11, 105 January
Week 3 in 105 January 12, 105 January 18, 105 January
Week 4 in 105 January 19, 105 January 25, 105 January
Week 5 in 105 January 26, 105 February 1, 105 January / February
Week 6 in 105 February 2, 105 February 8, 105 February
Week 7 in 105 February 9, 105 February 15, 105 February
Week 8 in 105 February 16, 105 February 22, 105 February
Week 9 in 105 February 23, 105 March 1, 105 February / March
Week 10 in 105 March 2, 105 March 8, 105 March
Week 11 in 105 March 9, 105 March 15, 105 March
Week 12 in 105 March 16, 105 March 22, 105 March
Week 13 in 105 March 23, 105 March 29, 105 March
Week 14 in 105 March 30, 105 April 5, 105 March / April
Week 15 in 105 April 6, 105 April 12, 105 April
Week 16 in 105 April 13, 105 April 19, 105 April
Week 17 in 105 April 20, 105 April 26, 105 April
Week 18 in 105 April 27, 105 May 3, 105 April / May
Week 19 in 105 May 4, 105 May 10, 105 May
Week 20 in 105 May 11, 105 May 17, 105 May
Week 21 in 105 May 18, 105 May 24, 105 May
Week 22 in 105 May 25, 105 May 31, 105 May
Week 23 in 105 June 1, 105 June 7, 105 June
Week 24 in 105 June 8, 105 June 14, 105 June
Week 25 in 105 June 15, 105 June 21, 105 June
Week 26 in 105 June 22, 105 June 28, 105 June
Week 27 in 105 June 29, 105 July 5, 105 June / July
Week 28 in 105 July 6, 105 July 12, 105 July
Week 29 in 105 July 13, 105 July 19, 105 July
Week 30 in 105 July 20, 105 July 26, 105 July
Week 31 in 105 July 27, 105 August 2, 105 July / August
Week 32 in 105 August 3, 105 August 9, 105 August
Week 33 in 105 August 10, 105 August 16, 105 August
Week 34 in 105 August 17, 105 August 23, 105 August
Week 35 in 105 August 24, 105 August 30, 105 August
Week 36 in 105 August 31, 105 September 6, 105 August / September
Week 37 in 105 September 7, 105 September 13, 105 September
Week 38 in 105 September 14, 105 September 20, 105 September
Week 39 in 105 September 21, 105 September 27, 105 September
Week 40 in 105 September 28, 105 October 4, 105 September / October
Week 41 in 105 October 5, 105 October 11, 105 October
Week 42 in 105 October 12, 105 October 18, 105 October
Week 43 in 105 October 19, 105 October 25, 105 October
Week 44 in 105 October 26, 105 November 1, 105 October / November
Week 45 in 105 November 2, 105 November 8, 105 November
Week 46 in 105 November 9, 105 November 15, 105 November
Week 47 in 105 November 16, 105 November 22, 105 November
Week 48 in 105 November 23, 105 November 29, 105 November
Week 49 in 105 November 30, 105 December 6, 105 November / December
Week 50 in 105 December 7, 105 December 13, 105 December
Week 51 in 105 December 14, 105 December 20, 105 December
Week 52 in 105 December 21, 105 December 27, 105 December
Week 53 in 105 December 28, 105 January 3, 106 December / January

Calendars 105

January 105
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 105
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 9232425262728
March 105
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 105
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 105
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 105
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 105
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 105
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 105
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 105
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 105
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 105
MoTuWeThFrSaSu
Week 2123456
Week 5078910111213
Week 5114151617181920
Week 5221222324252627
Week 5328293031

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 105 starts on December 29, 104 and ends on January 4, 105 (ISO 8601, Monday to Sunday). 105 has 53 ISO weeks, because 1 January 105 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 105 have?

105 has 53 ISO weeks, because 1 January 105 falls on a Thursday.

When does week 1 of 105 start?

Week 1 of 105 starts on December 29, 104 and ends on January 4, 105 (ISO 8601, Monday to Sunday).

When does the last week of 105 end?

Week 53 of 105 starts on December 28, 105 and ends on January 3, 106 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 105, 111, 116, 122, 128.

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.