Week numbers 173

173 has 52 ISO weeks. Week 1: Jan 4 – 10 · Week 52: Dec 27, 173 – Jan 2, 174

173 at a glance

Weeks in 17352
Week 1January 4, 173 – January 10, 173
Week 52December 27, 173 – January 2, 174
Days in 173365
Leap yearNo

All Weeks in 173

Week From To Month
Week 1 in 173 January 4, 173 January 10, 173 January
Week 2 in 173 January 11, 173 January 17, 173 January
Week 3 in 173 January 18, 173 January 24, 173 January
Week 4 in 173 January 25, 173 January 31, 173 January
Week 5 in 173 February 1, 173 February 7, 173 February
Week 6 in 173 February 8, 173 February 14, 173 February
Week 7 in 173 February 15, 173 February 21, 173 February
Week 8 in 173 February 22, 173 February 28, 173 February
Week 9 in 173 March 1, 173 March 7, 173 March
Week 10 in 173 March 8, 173 March 14, 173 March
Week 11 in 173 March 15, 173 March 21, 173 March
Week 12 in 173 March 22, 173 March 28, 173 March
Week 13 in 173 March 29, 173 April 4, 173 March / April
Week 14 in 173 April 5, 173 April 11, 173 April
Week 15 in 173 April 12, 173 April 18, 173 April
Week 16 in 173 April 19, 173 April 25, 173 April
Week 17 in 173 April 26, 173 May 2, 173 April / May
Week 18 in 173 May 3, 173 May 9, 173 May
Week 19 in 173 May 10, 173 May 16, 173 May
Week 20 in 173 May 17, 173 May 23, 173 May
Week 21 in 173 May 24, 173 May 30, 173 May
Week 22 in 173 May 31, 173 June 6, 173 May / June
Week 23 in 173 June 7, 173 June 13, 173 June
Week 24 in 173 June 14, 173 June 20, 173 June
Week 25 in 173 June 21, 173 June 27, 173 June
Week 26 in 173 June 28, 173 July 4, 173 June / July
Week 27 in 173 July 5, 173 July 11, 173 July
Week 28 in 173 July 12, 173 July 18, 173 July
Week 29 in 173 July 19, 173 July 25, 173 July
Week 30 in 173 July 26, 173 August 1, 173 July / August
Week 31 in 173 August 2, 173 August 8, 173 August
Week 32 in 173 August 9, 173 August 15, 173 August
Week 33 in 173 August 16, 173 August 22, 173 August
Week 34 in 173 August 23, 173 August 29, 173 August
Week 35 in 173 August 30, 173 September 5, 173 August / September
Week 36 in 173 September 6, 173 September 12, 173 September
Week 37 in 173 September 13, 173 September 19, 173 September
Week 38 in 173 September 20, 173 September 26, 173 September
Week 39 in 173 September 27, 173 October 3, 173 September / October
Week 40 in 173 October 4, 173 October 10, 173 October
Week 41 in 173 October 11, 173 October 17, 173 October
Week 42 in 173 October 18, 173 October 24, 173 October
Week 43 in 173 October 25, 173 October 31, 173 October
Week 44 in 173 November 1, 173 November 7, 173 November
Week 45 in 173 November 8, 173 November 14, 173 November
Week 46 in 173 November 15, 173 November 21, 173 November
Week 47 in 173 November 22, 173 November 28, 173 November
Week 48 in 173 November 29, 173 December 5, 173 November / December
Week 49 in 173 December 6, 173 December 12, 173 December
Week 50 in 173 December 13, 173 December 19, 173 December
Week 51 in 173 December 20, 173 December 26, 173 December
Week 52 in 173 December 27, 173 January 2, 174 December / January

Calendars 173

January 173
MoTuWeThFrSaSu
Week 53123
Week 145678910
Week 211121314151617
Week 318192021222324
Week 425262728293031
February 173
MoTuWeThFrSaSu
Week 51234567
Week 6891011121314
Week 715161718192021
Week 822232425262728
March 173
MoTuWeThFrSaSu
Week 91234567
Week 10891011121314
Week 1115161718192021
Week 1222232425262728
Week 13293031
April 173
MoTuWeThFrSaSu
Week 131234
Week 14567891011
Week 1512131415161718
Week 1619202122232425
Week 172627282930
May 173
MoTuWeThFrSaSu
Week 1712
Week 183456789
Week 1910111213141516
Week 2017181920212223
Week 2124252627282930
Week 2231
June 173
MoTuWeThFrSaSu
Week 22123456
Week 2378910111213
Week 2414151617181920
Week 2521222324252627
Week 26282930
July 173
MoTuWeThFrSaSu
Week 261234
Week 27567891011
Week 2812131415161718
Week 2919202122232425
Week 30262728293031
August 173
MoTuWeThFrSaSu
Week 301
Week 312345678
Week 329101112131415
Week 3316171819202122
Week 3423242526272829
Week 353031
September 173
MoTuWeThFrSaSu
Week 3512345
Week 366789101112
Week 3713141516171819
Week 3820212223242526
Week 3927282930
October 173
MoTuWeThFrSaSu
Week 39123
Week 4045678910
Week 4111121314151617
Week 4218192021222324
Week 4325262728293031
November 173
MoTuWeThFrSaSu
Week 441234567
Week 45891011121314
Week 4615161718192021
Week 4722232425262728
Week 482930
December 173
MoTuWeThFrSaSu
Week 112345
Week 496789101112
Week 5013141516171819
Week 5120212223242526
Week 522728293031

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 173 starts on January 4, 173 and ends on January 10, 173 (ISO 8601, Monday to Sunday). 173 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 173 have?

173 has 52 ISO weeks.

When does week 1 of 173 start?

Week 1 of 173 starts on January 4, 173 and ends on January 10, 173 (ISO 8601, Monday to Sunday).

When does the last week of 173 end?

Week 52 of 173 starts on December 27, 173 and ends on January 2, 174 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 178, 184, 189, 195, 201.

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.