Week numbers 503

503 has 52 ISO weeks. Week 1: Jan 1 – 7 · Week 52: Dec 24 – 30

503 at a glance

Weeks in 50352
Week 1January 1, 503 – January 7, 503
Week 52December 24, 503 – December 30, 503
Days in 503365
Leap yearNo

All Weeks in 503

Week From To Month
Week 1 in 503 January 1, 503 January 7, 503 January
Week 2 in 503 January 8, 503 January 14, 503 January
Week 3 in 503 January 15, 503 January 21, 503 January
Week 4 in 503 January 22, 503 January 28, 503 January
Week 5 in 503 January 29, 503 February 4, 503 January / February
Week 6 in 503 February 5, 503 February 11, 503 February
Week 7 in 503 February 12, 503 February 18, 503 February
Week 8 in 503 February 19, 503 February 25, 503 February
Week 9 in 503 February 26, 503 March 4, 503 February / March
Week 10 in 503 March 5, 503 March 11, 503 March
Week 11 in 503 March 12, 503 March 18, 503 March
Week 12 in 503 March 19, 503 March 25, 503 March
Week 13 in 503 March 26, 503 April 1, 503 March / April
Week 14 in 503 April 2, 503 April 8, 503 April
Week 15 in 503 April 9, 503 April 15, 503 April
Week 16 in 503 April 16, 503 April 22, 503 April
Week 17 in 503 April 23, 503 April 29, 503 April
Week 18 in 503 April 30, 503 May 6, 503 April / May
Week 19 in 503 May 7, 503 May 13, 503 May
Week 20 in 503 May 14, 503 May 20, 503 May
Week 21 in 503 May 21, 503 May 27, 503 May
Week 22 in 503 May 28, 503 June 3, 503 May / June
Week 23 in 503 June 4, 503 June 10, 503 June
Week 24 in 503 June 11, 503 June 17, 503 June
Week 25 in 503 June 18, 503 June 24, 503 June
Week 26 in 503 June 25, 503 July 1, 503 June / July
Week 27 in 503 July 2, 503 July 8, 503 July
Week 28 in 503 July 9, 503 July 15, 503 July
Week 29 in 503 July 16, 503 July 22, 503 July
Week 30 in 503 July 23, 503 July 29, 503 July
Week 31 in 503 July 30, 503 August 5, 503 July / August
Week 32 in 503 August 6, 503 August 12, 503 August
Week 33 in 503 August 13, 503 August 19, 503 August
Week 34 in 503 August 20, 503 August 26, 503 August
Week 35 in 503 August 27, 503 September 2, 503 August / September
Week 36 in 503 September 3, 503 September 9, 503 September
Week 37 in 503 September 10, 503 September 16, 503 September
Week 38 in 503 September 17, 503 September 23, 503 September
Week 39 in 503 September 24, 503 September 30, 503 September
Week 40 in 503 October 1, 503 October 7, 503 October
Week 41 in 503 October 8, 503 October 14, 503 October
Week 42 in 503 October 15, 503 October 21, 503 October
Week 43 in 503 October 22, 503 October 28, 503 October
Week 44 in 503 October 29, 503 November 4, 503 October / November
Week 45 in 503 November 5, 503 November 11, 503 November
Week 46 in 503 November 12, 503 November 18, 503 November
Week 47 in 503 November 19, 503 November 25, 503 November
Week 48 in 503 November 26, 503 December 2, 503 November / December
Week 49 in 503 December 3, 503 December 9, 503 December
Week 50 in 503 December 10, 503 December 16, 503 December
Week 51 in 503 December 17, 503 December 23, 503 December
Week 52 in 503 December 24, 503 December 30, 503 December

Calendars 503

January 503
MoTuWeThFrSaSu
Week 11234567
Week 2891011121314
Week 315161718192021
Week 422232425262728
Week 5293031
February 503
MoTuWeThFrSaSu
Week 51234
Week 6567891011
Week 712131415161718
Week 819202122232425
Week 9262728
March 503
MoTuWeThFrSaSu
Week 91234
Week 10567891011
Week 1112131415161718
Week 1219202122232425
Week 13262728293031
April 503
MoTuWeThFrSaSu
Week 131
Week 142345678
Week 159101112131415
Week 1616171819202122
Week 1723242526272829
Week 1830
May 503
MoTuWeThFrSaSu
Week 18123456
Week 1978910111213
Week 2014151617181920
Week 2121222324252627
Week 2228293031
June 503
MoTuWeThFrSaSu
Week 22123
Week 2345678910
Week 2411121314151617
Week 2518192021222324
Week 26252627282930
July 503
MoTuWeThFrSaSu
Week 261
Week 272345678
Week 289101112131415
Week 2916171819202122
Week 3023242526272829
Week 313031
August 503
MoTuWeThFrSaSu
Week 3112345
Week 326789101112
Week 3313141516171819
Week 3420212223242526
Week 352728293031
September 503
MoTuWeThFrSaSu
Week 3512
Week 363456789
Week 3710111213141516
Week 3817181920212223
Week 3924252627282930
October 503
MoTuWeThFrSaSu
Week 401234567
Week 41891011121314
Week 4215161718192021
Week 4322232425262728
Week 44293031
November 503
MoTuWeThFrSaSu
Week 441234
Week 45567891011
Week 4612131415161718
Week 4719202122232425
Week 482627282930
December 503
MoTuWeThFrSaSu
Week 212
Week 493456789
Week 5010111213141516
Week 5117181920212223
Week 5224252627282930
Week 131

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 503 starts on January 1, 503 and ends on January 7, 503 (ISO 8601, Monday to Sunday). 503 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 503 have?

503 has 52 ISO weeks.

When does week 1 of 503 start?

Week 1 of 503 starts on January 1, 503 and ends on January 7, 503 (ISO 8601, Monday to Sunday).

When does the last week of 503 end?

Week 52 of 503 starts on December 24, 503 and ends on December 30, 503 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 505, 511, 516, 522, 528.

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.