Week numbers 520

520 has 52 ISO weeks. Week 1: Jan 1 – 7 · Week 52: Dec 23 – 29

520 at a glance

Weeks in 52052
Week 1January 1, 520 – January 7, 520
Week 52December 23, 520 – December 29, 520
Days in 520366
Leap yearYes

All Weeks in 520

Week From To Month
Week 1 in 520 January 1, 520 January 7, 520 January
Week 2 in 520 January 8, 520 January 14, 520 January
Week 3 in 520 January 15, 520 January 21, 520 January
Week 4 in 520 January 22, 520 January 28, 520 January
Week 5 in 520 January 29, 520 February 4, 520 January / February
Week 6 in 520 February 5, 520 February 11, 520 February
Week 7 in 520 February 12, 520 February 18, 520 February
Week 8 in 520 February 19, 520 February 25, 520 February
Week 9 in 520 February 26, 520 March 3, 520 February / March
Week 10 in 520 March 4, 520 March 10, 520 March
Week 11 in 520 March 11, 520 March 17, 520 March
Week 12 in 520 March 18, 520 March 24, 520 March
Week 13 in 520 March 25, 520 March 31, 520 March
Week 14 in 520 April 1, 520 April 7, 520 April
Week 15 in 520 April 8, 520 April 14, 520 April
Week 16 in 520 April 15, 520 April 21, 520 April
Week 17 in 520 April 22, 520 April 28, 520 April
Week 18 in 520 April 29, 520 May 5, 520 April / May
Week 19 in 520 May 6, 520 May 12, 520 May
Week 20 in 520 May 13, 520 May 19, 520 May
Week 21 in 520 May 20, 520 May 26, 520 May
Week 22 in 520 May 27, 520 June 2, 520 May / June
Week 23 in 520 June 3, 520 June 9, 520 June
Week 24 in 520 June 10, 520 June 16, 520 June
Week 25 in 520 June 17, 520 June 23, 520 June
Week 26 in 520 June 24, 520 June 30, 520 June
Week 27 in 520 July 1, 520 July 7, 520 July
Week 28 in 520 July 8, 520 July 14, 520 July
Week 29 in 520 July 15, 520 July 21, 520 July
Week 30 in 520 July 22, 520 July 28, 520 July
Week 31 in 520 July 29, 520 August 4, 520 July / August
Week 32 in 520 August 5, 520 August 11, 520 August
Week 33 in 520 August 12, 520 August 18, 520 August
Week 34 in 520 August 19, 520 August 25, 520 August
Week 35 in 520 August 26, 520 September 1, 520 August / September
Week 36 in 520 September 2, 520 September 8, 520 September
Week 37 in 520 September 9, 520 September 15, 520 September
Week 38 in 520 September 16, 520 September 22, 520 September
Week 39 in 520 September 23, 520 September 29, 520 September
Week 40 in 520 September 30, 520 October 6, 520 September / October
Week 41 in 520 October 7, 520 October 13, 520 October
Week 42 in 520 October 14, 520 October 20, 520 October
Week 43 in 520 October 21, 520 October 27, 520 October
Week 44 in 520 October 28, 520 November 3, 520 October / November
Week 45 in 520 November 4, 520 November 10, 520 November
Week 46 in 520 November 11, 520 November 17, 520 November
Week 47 in 520 November 18, 520 November 24, 520 November
Week 48 in 520 November 25, 520 December 1, 520 November / December
Week 49 in 520 December 2, 520 December 8, 520 December
Week 50 in 520 December 9, 520 December 15, 520 December
Week 51 in 520 December 16, 520 December 22, 520 December
Week 52 in 520 December 23, 520 December 29, 520 December

Calendars 520

January 520
MoTuWeThFrSaSu
Week 11234567
Week 2891011121314
Week 315161718192021
Week 422232425262728
Week 5293031
February 520
MoTuWeThFrSaSu
Week 51234
Week 6567891011
Week 712131415161718
Week 819202122232425
Week 926272829
March 520
MoTuWeThFrSaSu
Week 9123
Week 1045678910
Week 1111121314151617
Week 1218192021222324
Week 1325262728293031
April 520
MoTuWeThFrSaSu
Week 141234567
Week 15891011121314
Week 1615161718192021
Week 1722232425262728
Week 182930
May 520
MoTuWeThFrSaSu
Week 1812345
Week 196789101112
Week 2013141516171819
Week 2120212223242526
Week 222728293031
June 520
MoTuWeThFrSaSu
Week 2212
Week 233456789
Week 2410111213141516
Week 2517181920212223
Week 2624252627282930
July 520
MoTuWeThFrSaSu
Week 271234567
Week 28891011121314
Week 2915161718192021
Week 3022232425262728
Week 31293031
August 520
MoTuWeThFrSaSu
Week 311234
Week 32567891011
Week 3312131415161718
Week 3419202122232425
Week 35262728293031
September 520
MoTuWeThFrSaSu
Week 351
Week 362345678
Week 379101112131415
Week 3816171819202122
Week 3923242526272829
Week 4030
October 520
MoTuWeThFrSaSu
Week 40123456
Week 4178910111213
Week 4214151617181920
Week 4321222324252627
Week 4428293031
November 520
MoTuWeThFrSaSu
Week 44123
Week 4545678910
Week 4611121314151617
Week 4718192021222324
Week 48252627282930
December 520
MoTuWeThFrSaSu
Week 21
Week 492345678
Week 509101112131415
Week 5116171819202122
Week 5223242526272829
Week 13031

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 520 starts on January 1, 520 and ends on January 7, 520 (ISO 8601, Monday to Sunday). 520 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 520 have?

520 has 52 ISO weeks.

When does week 1 of 520 start?

Week 1 of 520 starts on January 1, 520 and ends on January 7, 520 (ISO 8601, Monday to Sunday).

When does the last week of 520 end?

Week 52 of 520 starts on December 23, 520 and ends on December 29, 520 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 522, 528, 533, 539, 544.

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.