Week numbers 2155

2155 has 52 ISO weeks. Week 1 of 2155 starts on December 30, 2154 and ends on January 5, 2155 (ISO 8601, Monday to Sunday).

2155 at a glance

Weeks in 215552
Week 1December 30, 2154 – January 5, 2155
Week 52December 22, 2155 – December 28, 2155
Days in 2155365
Leap yearNo

All Weeks in 2155

Week From To Month
Week 1 in 2155 December 30, 2154 January 5, 2155 December / January
Week 2 in 2155 January 6, 2155 January 12, 2155 January
Week 3 in 2155 January 13, 2155 January 19, 2155 January
Week 4 in 2155 January 20, 2155 January 26, 2155 January
Week 5 in 2155 January 27, 2155 February 2, 2155 January / February
Week 6 in 2155 February 3, 2155 February 9, 2155 February
Week 7 in 2155 February 10, 2155 February 16, 2155 February
Week 8 in 2155 February 17, 2155 February 23, 2155 February
Week 9 in 2155 February 24, 2155 March 2, 2155 February / March
Week 10 in 2155 March 3, 2155 March 9, 2155 March
Week 11 in 2155 March 10, 2155 March 16, 2155 March
Week 12 in 2155 March 17, 2155 March 23, 2155 March
Week 13 in 2155 March 24, 2155 March 30, 2155 March
Week 14 in 2155 March 31, 2155 April 6, 2155 March / April
Week 15 in 2155 April 7, 2155 April 13, 2155 April
Week 16 in 2155 April 14, 2155 April 20, 2155 April
Week 17 in 2155 April 21, 2155 April 27, 2155 April
Week 18 in 2155 April 28, 2155 May 4, 2155 April / May
Week 19 in 2155 May 5, 2155 May 11, 2155 May
Week 20 in 2155 May 12, 2155 May 18, 2155 May
Week 21 in 2155 May 19, 2155 May 25, 2155 May
Week 22 in 2155 May 26, 2155 June 1, 2155 May / June
Week 23 in 2155 June 2, 2155 June 8, 2155 June
Week 24 in 2155 June 9, 2155 June 15, 2155 June
Week 25 in 2155 June 16, 2155 June 22, 2155 June
Week 26 in 2155 June 23, 2155 June 29, 2155 June
Week 27 in 2155 June 30, 2155 July 6, 2155 June / July
Week 28 in 2155 July 7, 2155 July 13, 2155 July
Week 29 in 2155 July 14, 2155 July 20, 2155 July
Week 30 in 2155 July 21, 2155 July 27, 2155 July
Week 31 in 2155 July 28, 2155 August 3, 2155 July / August
Week 32 in 2155 August 4, 2155 August 10, 2155 August
Week 33 in 2155 August 11, 2155 August 17, 2155 August
Week 34 in 2155 August 18, 2155 August 24, 2155 August
Week 35 in 2155 August 25, 2155 August 31, 2155 August
Week 36 in 2155 September 1, 2155 September 7, 2155 September
Week 37 in 2155 September 8, 2155 September 14, 2155 September
Week 38 in 2155 September 15, 2155 September 21, 2155 September
Week 39 in 2155 September 22, 2155 September 28, 2155 September
Week 40 in 2155 September 29, 2155 October 5, 2155 September / October
Week 41 in 2155 October 6, 2155 October 12, 2155 October
Week 42 in 2155 October 13, 2155 October 19, 2155 October
Week 43 in 2155 October 20, 2155 October 26, 2155 October
Week 44 in 2155 October 27, 2155 November 2, 2155 October / November
Week 45 in 2155 November 3, 2155 November 9, 2155 November
Week 46 in 2155 November 10, 2155 November 16, 2155 November
Week 47 in 2155 November 17, 2155 November 23, 2155 November
Week 48 in 2155 November 24, 2155 November 30, 2155 November
Week 49 in 2155 December 1, 2155 December 7, 2155 December
Week 50 in 2155 December 8, 2155 December 14, 2155 December
Week 51 in 2155 December 15, 2155 December 21, 2155 December
Week 52 in 2155 December 22, 2155 December 28, 2155 December

Calendars 2155

January 2155
MoTuWeThFrSaSu
Week 112345
Week 26789101112
Week 313141516171819
Week 420212223242526
Week 52728293031
February 2155
MoTuWeThFrSaSu
Week 512
Week 63456789
Week 710111213141516
Week 817181920212223
Week 92425262728
March 2155
MoTuWeThFrSaSu
Week 912
Week 103456789
Week 1110111213141516
Week 1217181920212223
Week 1324252627282930
Week 1431
April 2155
MoTuWeThFrSaSu
Week 14123456
Week 1578910111213
Week 1614151617181920
Week 1721222324252627
Week 18282930
May 2155
MoTuWeThFrSaSu
Week 181234
Week 19567891011
Week 2012131415161718
Week 2119202122232425
Week 22262728293031
June 2155
MoTuWeThFrSaSu
Week 221
Week 232345678
Week 249101112131415
Week 2516171819202122
Week 2623242526272829
Week 2730
July 2155
MoTuWeThFrSaSu
Week 27123456
Week 2878910111213
Week 2914151617181920
Week 3021222324252627
Week 3128293031
August 2155
MoTuWeThFrSaSu
Week 31123
Week 3245678910
Week 3311121314151617
Week 3418192021222324
Week 3525262728293031
September 2155
MoTuWeThFrSaSu
Week 361234567
Week 37891011121314
Week 3815161718192021
Week 3922232425262728
Week 402930
October 2155
MoTuWeThFrSaSu
Week 4012345
Week 416789101112
Week 4213141516171819
Week 4320212223242526
Week 442728293031
November 2155
MoTuWeThFrSaSu
Week 4412
Week 453456789
Week 4610111213141516
Week 4717181920212223
Week 4824252627282930
December 2155
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 2155 starts on December 30, 2154 and ends on January 5, 2155 (ISO 8601, Monday to Sunday). 2155 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 2155 have?

2155 has 52 ISO weeks.

When does week 1 of 2155 start?

Week 1 of 2155 starts on December 30, 2154 and ends on January 5, 2155 (ISO 8601, Monday to Sunday).

When does the last week of 2155 end?

Week 52 of 2155 starts on December 22, 2155 and ends on December 28, 2155 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 2156, 2161, 2167, 2172, 2178.

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.