Week numbers 1990

1990 has 52 ISO weeks. Week 1 of 1990 starts on January 1, 1990 and ends on January 7, 1990 (ISO 8601, Monday to Sunday).

1990 at a glance

Weeks in 199052
Week 1January 1, 1990 – January 7, 1990
Week 52December 24, 1990 – December 30, 1990
Days in 1990365
Leap yearNo

All Weeks in 1990

Week From To Month
Week 1 in 1990 January 1, 1990 January 7, 1990 January
Week 2 in 1990 January 8, 1990 January 14, 1990 January
Week 3 in 1990 January 15, 1990 January 21, 1990 January
Week 4 in 1990 January 22, 1990 January 28, 1990 January
Week 5 in 1990 January 29, 1990 February 4, 1990 January / February
Week 6 in 1990 February 5, 1990 February 11, 1990 February
Week 7 in 1990 February 12, 1990 February 18, 1990 February
Week 8 in 1990 February 19, 1990 February 25, 1990 February
Week 9 in 1990 February 26, 1990 March 4, 1990 February / March
Week 10 in 1990 March 5, 1990 March 11, 1990 March
Week 11 in 1990 March 12, 1990 March 18, 1990 March
Week 12 in 1990 March 19, 1990 March 25, 1990 March
Week 13 in 1990 March 26, 1990 April 1, 1990 March / April
Week 14 in 1990 April 2, 1990 April 8, 1990 April
Week 15 in 1990 April 9, 1990 April 15, 1990 April
Week 16 in 1990 April 16, 1990 April 22, 1990 April
Week 17 in 1990 April 23, 1990 April 29, 1990 April
Week 18 in 1990 April 30, 1990 May 6, 1990 April / May
Week 19 in 1990 May 7, 1990 May 13, 1990 May
Week 20 in 1990 May 14, 1990 May 20, 1990 May
Week 21 in 1990 May 21, 1990 May 27, 1990 May
Week 22 in 1990 May 28, 1990 June 3, 1990 May / June
Week 23 in 1990 June 4, 1990 June 10, 1990 June
Week 24 in 1990 June 11, 1990 June 17, 1990 June
Week 25 in 1990 June 18, 1990 June 24, 1990 June
Week 26 in 1990 June 25, 1990 July 1, 1990 June / July
Week 27 in 1990 July 2, 1990 July 8, 1990 July
Week 28 in 1990 July 9, 1990 July 15, 1990 July
Week 29 in 1990 July 16, 1990 July 22, 1990 July
Week 30 in 1990 July 23, 1990 July 29, 1990 July
Week 31 in 1990 July 30, 1990 August 5, 1990 July / August
Week 32 in 1990 August 6, 1990 August 12, 1990 August
Week 33 in 1990 August 13, 1990 August 19, 1990 August
Week 34 in 1990 August 20, 1990 August 26, 1990 August
Week 35 in 1990 August 27, 1990 September 2, 1990 August / September
Week 36 in 1990 September 3, 1990 September 9, 1990 September
Week 37 in 1990 September 10, 1990 September 16, 1990 September
Week 38 in 1990 September 17, 1990 September 23, 1990 September
Week 39 in 1990 September 24, 1990 September 30, 1990 September
Week 40 in 1990 October 1, 1990 October 7, 1990 October
Week 41 in 1990 October 8, 1990 October 14, 1990 October
Week 42 in 1990 October 15, 1990 October 21, 1990 October
Week 43 in 1990 October 22, 1990 October 28, 1990 October
Week 44 in 1990 October 29, 1990 November 4, 1990 October / November
Week 45 in 1990 November 5, 1990 November 11, 1990 November
Week 46 in 1990 November 12, 1990 November 18, 1990 November
Week 47 in 1990 November 19, 1990 November 25, 1990 November
Week 48 in 1990 November 26, 1990 December 2, 1990 November / December
Week 49 in 1990 December 3, 1990 December 9, 1990 December
Week 50 in 1990 December 10, 1990 December 16, 1990 December
Week 51 in 1990 December 17, 1990 December 23, 1990 December
Week 52 in 1990 December 24, 1990 December 30, 1990 December

Calendars 1990

January 1990
MoTuWeThFrSaSu
Week 11234567
Week 2891011121314
Week 315161718192021
Week 422232425262728
Week 5293031
February 1990
MoTuWeThFrSaSu
Week 51234
Week 6567891011
Week 712131415161718
Week 819202122232425
Week 9262728
March 1990
MoTuWeThFrSaSu
Week 91234
Week 10567891011
Week 1112131415161718
Week 1219202122232425
Week 13262728293031
April 1990
MoTuWeThFrSaSu
Week 131
Week 142345678
Week 159101112131415
Week 1616171819202122
Week 1723242526272829
Week 1830
May 1990
MoTuWeThFrSaSu
Week 18123456
Week 1978910111213
Week 2014151617181920
Week 2121222324252627
Week 2228293031
June 1990
MoTuWeThFrSaSu
Week 22123
Week 2345678910
Week 2411121314151617
Week 2518192021222324
Week 26252627282930
July 1990
MoTuWeThFrSaSu
Week 261
Week 272345678
Week 289101112131415
Week 2916171819202122
Week 3023242526272829
Week 313031
August 1990
MoTuWeThFrSaSu
Week 3112345
Week 326789101112
Week 3313141516171819
Week 3420212223242526
Week 352728293031
September 1990
MoTuWeThFrSaSu
Week 3512
Week 363456789
Week 3710111213141516
Week 3817181920212223
Week 3924252627282930
October 1990
MoTuWeThFrSaSu
Week 401234567
Week 41891011121314
Week 4215161718192021
Week 4322232425262728
Week 44293031
November 1990
MoTuWeThFrSaSu
Week 441234
Week 45567891011
Week 4612131415161718
Week 4719202122232425
Week 482627282930
December 1990
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 1990 starts on January 1, 1990 and ends on January 7, 1990 (ISO 8601, Monday to Sunday). 1990 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 1990 have?

1990 has 52 ISO weeks.

When does week 1 of 1990 start?

Week 1 of 1990 starts on January 1, 1990 and ends on January 7, 1990 (ISO 8601, Monday to Sunday).

When does the last week of 1990 end?

Week 52 of 1990 starts on December 24, 1990 and ends on December 30, 1990 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 1992, 1998, 2004, 2009, 2015.

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.