Week numbers 820

820 has 53 ISO weeks, because it is a leap year that starts on a Wednesday. Week 1: Dec 30, 819 – Jan 5, 820 · Week 53: Dec 28, 820 – Jan 3, 821

820 at a glance

Weeks in 82053
Week 1December 30, 819 – January 5, 820
Week 53December 28, 820 – January 3, 821
Days in 820366
Leap yearYes

All Weeks in 820

Week From To Month
Week 1 in 820 December 30, 819 January 5, 820 December / January
Week 2 in 820 January 6, 820 January 12, 820 January
Week 3 in 820 January 13, 820 January 19, 820 January
Week 4 in 820 January 20, 820 January 26, 820 January
Week 5 in 820 January 27, 820 February 2, 820 January / February
Week 6 in 820 February 3, 820 February 9, 820 February
Week 7 in 820 February 10, 820 February 16, 820 February
Week 8 in 820 February 17, 820 February 23, 820 February
Week 9 in 820 February 24, 820 March 1, 820 February / March
Week 10 in 820 March 2, 820 March 8, 820 March
Week 11 in 820 March 9, 820 March 15, 820 March
Week 12 in 820 March 16, 820 March 22, 820 March
Week 13 in 820 March 23, 820 March 29, 820 March
Week 14 in 820 March 30, 820 April 5, 820 March / April
Week 15 in 820 April 6, 820 April 12, 820 April
Week 16 in 820 April 13, 820 April 19, 820 April
Week 17 in 820 April 20, 820 April 26, 820 April
Week 18 in 820 April 27, 820 May 3, 820 April / May
Week 19 in 820 May 4, 820 May 10, 820 May
Week 20 in 820 May 11, 820 May 17, 820 May
Week 21 in 820 May 18, 820 May 24, 820 May
Week 22 in 820 May 25, 820 May 31, 820 May
Week 23 in 820 June 1, 820 June 7, 820 June
Week 24 in 820 June 8, 820 June 14, 820 June
Week 25 in 820 June 15, 820 June 21, 820 June
Week 26 in 820 June 22, 820 June 28, 820 June
Week 27 in 820 June 29, 820 July 5, 820 June / July
Week 28 in 820 July 6, 820 July 12, 820 July
Week 29 in 820 July 13, 820 July 19, 820 July
Week 30 in 820 July 20, 820 July 26, 820 July
Week 31 in 820 July 27, 820 August 2, 820 July / August
Week 32 in 820 August 3, 820 August 9, 820 August
Week 33 in 820 August 10, 820 August 16, 820 August
Week 34 in 820 August 17, 820 August 23, 820 August
Week 35 in 820 August 24, 820 August 30, 820 August
Week 36 in 820 August 31, 820 September 6, 820 August / September
Week 37 in 820 September 7, 820 September 13, 820 September
Week 38 in 820 September 14, 820 September 20, 820 September
Week 39 in 820 September 21, 820 September 27, 820 September
Week 40 in 820 September 28, 820 October 4, 820 September / October
Week 41 in 820 October 5, 820 October 11, 820 October
Week 42 in 820 October 12, 820 October 18, 820 October
Week 43 in 820 October 19, 820 October 25, 820 October
Week 44 in 820 October 26, 820 November 1, 820 October / November
Week 45 in 820 November 2, 820 November 8, 820 November
Week 46 in 820 November 9, 820 November 15, 820 November
Week 47 in 820 November 16, 820 November 22, 820 November
Week 48 in 820 November 23, 820 November 29, 820 November
Week 49 in 820 November 30, 820 December 6, 820 November / December
Week 50 in 820 December 7, 820 December 13, 820 December
Week 51 in 820 December 14, 820 December 20, 820 December
Week 52 in 820 December 21, 820 December 27, 820 December
Week 53 in 820 December 28, 820 January 3, 821 December / January

Calendars 820

January 820
MoTuWeThFrSaSu
Week 112345
Week 26789101112
Week 313141516171819
Week 420212223242526
Week 52728293031
February 820
MoTuWeThFrSaSu
Week 512
Week 63456789
Week 710111213141516
Week 817181920212223
Week 9242526272829
March 820
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 820
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 820
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 820
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 820
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 820
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 820
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 820
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 820
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 820
MoTuWeThFrSaSu
Week 2123456
Week 5078910111213
Week 5114151617181920
Week 5221222324252627
Week 5328293031

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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 820 starts on December 30, 819 and ends on January 5, 820 (ISO 8601, Monday to Sunday). 820 has 53 ISO weeks, because it is a leap year that starts on a Wednesday.

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 820 have?

820 has 53 ISO weeks, because it is a leap year that starts on a Wednesday.

When does week 1 of 820 start?

Week 1 of 820 starts on December 30, 819 and ends on January 5, 820 (ISO 8601, Monday to Sunday).

When does the last week of 820 end?

Week 53 of 820 starts on December 28, 820 and ends on January 3, 821 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 820, 826, 832, 837, 843.

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.