Week numbers 2005

2005 has 52 ISO weeks. Week 1: Jan 3 – 9 · Week 52: Dec 26, 2005 – Jan 1, 2006

2005 at a glance

Weeks in 200552
Week 1January 3, 2005 – January 9, 2005
Week 52December 26, 2005 – January 1, 2006
Days in 2005365
Leap yearNo

All Weeks in 2005

Week From To Month
Week 1 in 2005 January 3, 2005 January 9, 2005 January
Week 2 in 2005 January 10, 2005 January 16, 2005 January
Week 3 in 2005 January 17, 2005 January 23, 2005 January
Week 4 in 2005 January 24, 2005 January 30, 2005 January
Week 5 in 2005 January 31, 2005 February 6, 2005 January / February
Week 6 in 2005 February 7, 2005 February 13, 2005 February
Week 7 in 2005 February 14, 2005 February 20, 2005 February
Week 8 in 2005 February 21, 2005 February 27, 2005 February
Week 9 in 2005 February 28, 2005 March 6, 2005 February / March
Week 10 in 2005 March 7, 2005 March 13, 2005 March
Week 11 in 2005 March 14, 2005 March 20, 2005 March
Week 12 in 2005 March 21, 2005 March 27, 2005 March
Week 13 in 2005 March 28, 2005 April 3, 2005 March / April
Week 14 in 2005 April 4, 2005 April 10, 2005 April
Week 15 in 2005 April 11, 2005 April 17, 2005 April
Week 16 in 2005 April 18, 2005 April 24, 2005 April
Week 17 in 2005 April 25, 2005 May 1, 2005 April / May
Week 18 in 2005 May 2, 2005 May 8, 2005 May
Week 19 in 2005 May 9, 2005 May 15, 2005 May
Week 20 in 2005 May 16, 2005 May 22, 2005 May
Week 21 in 2005 May 23, 2005 May 29, 2005 May
Week 22 in 2005 May 30, 2005 June 5, 2005 May / June
Week 23 in 2005 June 6, 2005 June 12, 2005 June
Week 24 in 2005 June 13, 2005 June 19, 2005 June
Week 25 in 2005 June 20, 2005 June 26, 2005 June
Week 26 in 2005 June 27, 2005 July 3, 2005 June / July
Week 27 in 2005 July 4, 2005 July 10, 2005 July
Week 28 in 2005 July 11, 2005 July 17, 2005 July
Week 29 in 2005 July 18, 2005 July 24, 2005 July
Week 30 in 2005 July 25, 2005 July 31, 2005 July
Week 31 in 2005 August 1, 2005 August 7, 2005 August
Week 32 in 2005 August 8, 2005 August 14, 2005 August
Week 33 in 2005 August 15, 2005 August 21, 2005 August
Week 34 in 2005 August 22, 2005 August 28, 2005 August
Week 35 in 2005 August 29, 2005 September 4, 2005 August / September
Week 36 in 2005 September 5, 2005 September 11, 2005 September
Week 37 in 2005 September 12, 2005 September 18, 2005 September
Week 38 in 2005 September 19, 2005 September 25, 2005 September
Week 39 in 2005 September 26, 2005 October 2, 2005 September / October
Week 40 in 2005 October 3, 2005 October 9, 2005 October
Week 41 in 2005 October 10, 2005 October 16, 2005 October
Week 42 in 2005 October 17, 2005 October 23, 2005 October
Week 43 in 2005 October 24, 2005 October 30, 2005 October
Week 44 in 2005 October 31, 2005 November 6, 2005 October / November
Week 45 in 2005 November 7, 2005 November 13, 2005 November
Week 46 in 2005 November 14, 2005 November 20, 2005 November
Week 47 in 2005 November 21, 2005 November 27, 2005 November
Week 48 in 2005 November 28, 2005 December 4, 2005 November / December
Week 49 in 2005 December 5, 2005 December 11, 2005 December
Week 50 in 2005 December 12, 2005 December 18, 2005 December
Week 51 in 2005 December 19, 2005 December 25, 2005 December
Week 52 in 2005 December 26, 2005 January 1, 2006 December / January

Calendars 2005

January 2005
MoTuWeThFrSaSu
Week 5312
Week 13456789
Week 210111213141516
Week 317181920212223
Week 424252627282930
Week 531
February 2005
MoTuWeThFrSaSu
Week 5123456
Week 678910111213
Week 714151617181920
Week 821222324252627
Week 928
March 2005
MoTuWeThFrSaSu
Week 9123456
Week 1078910111213
Week 1114151617181920
Week 1221222324252627
Week 1328293031
April 2005
MoTuWeThFrSaSu
Week 13123
Week 1445678910
Week 1511121314151617
Week 1618192021222324
Week 17252627282930
May 2005
MoTuWeThFrSaSu
Week 171
Week 182345678
Week 199101112131415
Week 2016171819202122
Week 2123242526272829
Week 223031
June 2005
MoTuWeThFrSaSu
Week 2212345
Week 236789101112
Week 2413141516171819
Week 2520212223242526
Week 2627282930
July 2005
MoTuWeThFrSaSu
Week 26123
Week 2745678910
Week 2811121314151617
Week 2918192021222324
Week 3025262728293031
August 2005
MoTuWeThFrSaSu
Week 311234567
Week 32891011121314
Week 3315161718192021
Week 3422232425262728
Week 35293031
September 2005
MoTuWeThFrSaSu
Week 351234
Week 36567891011
Week 3712131415161718
Week 3819202122232425
Week 392627282930
October 2005
MoTuWeThFrSaSu
Week 3912
Week 403456789
Week 4110111213141516
Week 4217181920212223
Week 4324252627282930
Week 4431
November 2005
MoTuWeThFrSaSu
Week 44123456
Week 4578910111213
Week 4614151617181920
Week 4721222324252627
Week 48282930
December 2005
MoTuWeThFrSaSu
Week 11234
Week 49567891011
Week 5012131415161718
Week 5119202122232425
Week 52262728293031

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 2005 starts on January 3, 2005 and ends on January 9, 2005 (ISO 8601, Monday to Sunday). 2005 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 2005 have?

2005 has 52 ISO weeks.

When does week 1 of 2005 start?

Week 1 of 2005 starts on January 3, 2005 and ends on January 9, 2005 (ISO 8601, Monday to Sunday).

When does the last week of 2005 end?

Week 52 of 2005 starts on December 26, 2005 and ends on January 1, 2006 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 2009, 2015, 2020, 2026, 2032.

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.