Week numbers 426

426 has 53 ISO weeks, because 1 January 426 falls on a Thursday. Week 1: Dec 29, 425 – Jan 4, 426 · Week 53: Dec 28, 426 – Jan 3, 427

426 at a glance

Weeks in 42653
Week 1December 29, 425 – January 4, 426
Week 53December 28, 426 – January 3, 427
Days in 426365
Leap yearNo

All Weeks in 426

Week From To Month
Week 1 in 426 December 29, 425 January 4, 426 December / January
Week 2 in 426 January 5, 426 January 11, 426 January
Week 3 in 426 January 12, 426 January 18, 426 January
Week 4 in 426 January 19, 426 January 25, 426 January
Week 5 in 426 January 26, 426 February 1, 426 January / February
Week 6 in 426 February 2, 426 February 8, 426 February
Week 7 in 426 February 9, 426 February 15, 426 February
Week 8 in 426 February 16, 426 February 22, 426 February
Week 9 in 426 February 23, 426 March 1, 426 February / March
Week 10 in 426 March 2, 426 March 8, 426 March
Week 11 in 426 March 9, 426 March 15, 426 March
Week 12 in 426 March 16, 426 March 22, 426 March
Week 13 in 426 March 23, 426 March 29, 426 March
Week 14 in 426 March 30, 426 April 5, 426 March / April
Week 15 in 426 April 6, 426 April 12, 426 April
Week 16 in 426 April 13, 426 April 19, 426 April
Week 17 in 426 April 20, 426 April 26, 426 April
Week 18 in 426 April 27, 426 May 3, 426 April / May
Week 19 in 426 May 4, 426 May 10, 426 May
Week 20 in 426 May 11, 426 May 17, 426 May
Week 21 in 426 May 18, 426 May 24, 426 May
Week 22 in 426 May 25, 426 May 31, 426 May
Week 23 in 426 June 1, 426 June 7, 426 June
Week 24 in 426 June 8, 426 June 14, 426 June
Week 25 in 426 June 15, 426 June 21, 426 June
Week 26 in 426 June 22, 426 June 28, 426 June
Week 27 in 426 June 29, 426 July 5, 426 June / July
Week 28 in 426 July 6, 426 July 12, 426 July
Week 29 in 426 July 13, 426 July 19, 426 July
Week 30 in 426 July 20, 426 July 26, 426 July
Week 31 in 426 July 27, 426 August 2, 426 July / August
Week 32 in 426 August 3, 426 August 9, 426 August
Week 33 in 426 August 10, 426 August 16, 426 August
Week 34 in 426 August 17, 426 August 23, 426 August
Week 35 in 426 August 24, 426 August 30, 426 August
Week 36 in 426 August 31, 426 September 6, 426 August / September
Week 37 in 426 September 7, 426 September 13, 426 September
Week 38 in 426 September 14, 426 September 20, 426 September
Week 39 in 426 September 21, 426 September 27, 426 September
Week 40 in 426 September 28, 426 October 4, 426 September / October
Week 41 in 426 October 5, 426 October 11, 426 October
Week 42 in 426 October 12, 426 October 18, 426 October
Week 43 in 426 October 19, 426 October 25, 426 October
Week 44 in 426 October 26, 426 November 1, 426 October / November
Week 45 in 426 November 2, 426 November 8, 426 November
Week 46 in 426 November 9, 426 November 15, 426 November
Week 47 in 426 November 16, 426 November 22, 426 November
Week 48 in 426 November 23, 426 November 29, 426 November
Week 49 in 426 November 30, 426 December 6, 426 November / December
Week 50 in 426 December 7, 426 December 13, 426 December
Week 51 in 426 December 14, 426 December 20, 426 December
Week 52 in 426 December 21, 426 December 27, 426 December
Week 53 in 426 December 28, 426 January 3, 427 December / January

Calendars 426

January 426
MoTuWeThFrSaSu
Week 11234
Week 2567891011
Week 312131415161718
Week 419202122232425
Week 5262728293031
February 426
MoTuWeThFrSaSu
Week 51
Week 62345678
Week 79101112131415
Week 816171819202122
Week 9232425262728
March 426
MoTuWeThFrSaSu
Week 91
Week 102345678
Week 119101112131415
Week 1216171819202122
Week 1323242526272829
Week 143031
April 426
MoTuWeThFrSaSu
Week 1412345
Week 156789101112
Week 1613141516171819
Week 1720212223242526
Week 1827282930
May 426
MoTuWeThFrSaSu
Week 18123
Week 1945678910
Week 2011121314151617
Week 2118192021222324
Week 2225262728293031
June 426
MoTuWeThFrSaSu
Week 231234567
Week 24891011121314
Week 2515161718192021
Week 2622232425262728
Week 272930
July 426
MoTuWeThFrSaSu
Week 2712345
Week 286789101112
Week 2913141516171819
Week 3020212223242526
Week 312728293031
August 426
MoTuWeThFrSaSu
Week 3112
Week 323456789
Week 3310111213141516
Week 3417181920212223
Week 3524252627282930
Week 3631
September 426
MoTuWeThFrSaSu
Week 36123456
Week 3778910111213
Week 3814151617181920
Week 3921222324252627
Week 40282930
October 426
MoTuWeThFrSaSu
Week 401234
Week 41567891011
Week 4212131415161718
Week 4319202122232425
Week 44262728293031
November 426
MoTuWeThFrSaSu
Week 441
Week 452345678
Week 469101112131415
Week 4716171819202122
Week 4823242526272829
Week 4930
December 426
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 426 starts on December 29, 425 and ends on January 4, 426 (ISO 8601, Monday to Sunday). 426 has 53 ISO weeks, because 1 January 426 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 426 have?

426 has 53 ISO weeks, because 1 January 426 falls on a Thursday.

When does week 1 of 426 start?

Week 1 of 426 starts on December 29, 425 and ends on January 4, 426 (ISO 8601, Monday to Sunday).

When does the last week of 426 end?

Week 53 of 426 starts on December 28, 426 and ends on January 3, 427 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 426, 432, 437, 443, 448.

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.