Week numbers 178

178 has 53 ISO weeks, because 1 January 178 falls on a Thursday. Week 1: Dec 29, 177 – Jan 4, 178 · Week 53: Dec 28, 178 – Jan 3, 179

178 at a glance

Weeks in 17853
Week 1December 29, 177 – January 4, 178
Week 53December 28, 178 – January 3, 179
Days in 178365
Leap yearNo

All Weeks in 178

Week From To Month
Week 1 in 178 December 29, 177 January 4, 178 December / January
Week 2 in 178 January 5, 178 January 11, 178 January
Week 3 in 178 January 12, 178 January 18, 178 January
Week 4 in 178 January 19, 178 January 25, 178 January
Week 5 in 178 January 26, 178 February 1, 178 January / February
Week 6 in 178 February 2, 178 February 8, 178 February
Week 7 in 178 February 9, 178 February 15, 178 February
Week 8 in 178 February 16, 178 February 22, 178 February
Week 9 in 178 February 23, 178 March 1, 178 February / March
Week 10 in 178 March 2, 178 March 8, 178 March
Week 11 in 178 March 9, 178 March 15, 178 March
Week 12 in 178 March 16, 178 March 22, 178 March
Week 13 in 178 March 23, 178 March 29, 178 March
Week 14 in 178 March 30, 178 April 5, 178 March / April
Week 15 in 178 April 6, 178 April 12, 178 April
Week 16 in 178 April 13, 178 April 19, 178 April
Week 17 in 178 April 20, 178 April 26, 178 April
Week 18 in 178 April 27, 178 May 3, 178 April / May
Week 19 in 178 May 4, 178 May 10, 178 May
Week 20 in 178 May 11, 178 May 17, 178 May
Week 21 in 178 May 18, 178 May 24, 178 May
Week 22 in 178 May 25, 178 May 31, 178 May
Week 23 in 178 June 1, 178 June 7, 178 June
Week 24 in 178 June 8, 178 June 14, 178 June
Week 25 in 178 June 15, 178 June 21, 178 June
Week 26 in 178 June 22, 178 June 28, 178 June
Week 27 in 178 June 29, 178 July 5, 178 June / July
Week 28 in 178 July 6, 178 July 12, 178 July
Week 29 in 178 July 13, 178 July 19, 178 July
Week 30 in 178 July 20, 178 July 26, 178 July
Week 31 in 178 July 27, 178 August 2, 178 July / August
Week 32 in 178 August 3, 178 August 9, 178 August
Week 33 in 178 August 10, 178 August 16, 178 August
Week 34 in 178 August 17, 178 August 23, 178 August
Week 35 in 178 August 24, 178 August 30, 178 August
Week 36 in 178 August 31, 178 September 6, 178 August / September
Week 37 in 178 September 7, 178 September 13, 178 September
Week 38 in 178 September 14, 178 September 20, 178 September
Week 39 in 178 September 21, 178 September 27, 178 September
Week 40 in 178 September 28, 178 October 4, 178 September / October
Week 41 in 178 October 5, 178 October 11, 178 October
Week 42 in 178 October 12, 178 October 18, 178 October
Week 43 in 178 October 19, 178 October 25, 178 October
Week 44 in 178 October 26, 178 November 1, 178 October / November
Week 45 in 178 November 2, 178 November 8, 178 November
Week 46 in 178 November 9, 178 November 15, 178 November
Week 47 in 178 November 16, 178 November 22, 178 November
Week 48 in 178 November 23, 178 November 29, 178 November
Week 49 in 178 November 30, 178 December 6, 178 November / December
Week 50 in 178 December 7, 178 December 13, 178 December
Week 51 in 178 December 14, 178 December 20, 178 December
Week 52 in 178 December 21, 178 December 27, 178 December
Week 53 in 178 December 28, 178 January 3, 179 December / January

Calendars 178

January 178
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 178
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 9232425262728
March 178
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 178
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 178
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 178
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 178
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 178
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 178
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 178
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 178
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 178
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 178 starts on December 29, 177 and ends on January 4, 178 (ISO 8601, Monday to Sunday). 178 has 53 ISO weeks, because 1 January 178 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 178 have?

178 has 53 ISO weeks, because 1 January 178 falls on a Thursday.

When does week 1 of 178 start?

Week 1 of 178 starts on December 29, 177 and ends on January 4, 178 (ISO 8601, Monday to Sunday).

When does the last week of 178 end?

Week 53 of 178 starts on December 28, 178 and ends on January 3, 179 (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.