Week numbers 1850

1850 has 52 ISO weeks. Week 1 of 1850 starts on December 31, 1849 and ends on January 6, 1850 (ISO 8601, Monday to Sunday).

1850 at a glance

Weeks in 185052
Week 1December 31, 1849 – January 6, 1850
Week 52December 23, 1850 – December 29, 1850
Days in 1850365
Leap yearNo

All Weeks in 1850

Week From To Month
Week 1 in 1850 December 31, 1849 January 6, 1850 December / January
Week 2 in 1850 January 7, 1850 January 13, 1850 January
Week 3 in 1850 January 14, 1850 January 20, 1850 January
Week 4 in 1850 January 21, 1850 January 27, 1850 January
Week 5 in 1850 January 28, 1850 February 3, 1850 January / February
Week 6 in 1850 February 4, 1850 February 10, 1850 February
Week 7 in 1850 February 11, 1850 February 17, 1850 February
Week 8 in 1850 February 18, 1850 February 24, 1850 February
Week 9 in 1850 February 25, 1850 March 3, 1850 February / March
Week 10 in 1850 March 4, 1850 March 10, 1850 March
Week 11 in 1850 March 11, 1850 March 17, 1850 March
Week 12 in 1850 March 18, 1850 March 24, 1850 March
Week 13 in 1850 March 25, 1850 March 31, 1850 March
Week 14 in 1850 April 1, 1850 April 7, 1850 April
Week 15 in 1850 April 8, 1850 April 14, 1850 April
Week 16 in 1850 April 15, 1850 April 21, 1850 April
Week 17 in 1850 April 22, 1850 April 28, 1850 April
Week 18 in 1850 April 29, 1850 May 5, 1850 April / May
Week 19 in 1850 May 6, 1850 May 12, 1850 May
Week 20 in 1850 May 13, 1850 May 19, 1850 May
Week 21 in 1850 May 20, 1850 May 26, 1850 May
Week 22 in 1850 May 27, 1850 June 2, 1850 May / June
Week 23 in 1850 June 3, 1850 June 9, 1850 June
Week 24 in 1850 June 10, 1850 June 16, 1850 June
Week 25 in 1850 June 17, 1850 June 23, 1850 June
Week 26 in 1850 June 24, 1850 June 30, 1850 June
Week 27 in 1850 July 1, 1850 July 7, 1850 July
Week 28 in 1850 July 8, 1850 July 14, 1850 July
Week 29 in 1850 July 15, 1850 July 21, 1850 July
Week 30 in 1850 July 22, 1850 July 28, 1850 July
Week 31 in 1850 July 29, 1850 August 4, 1850 July / August
Week 32 in 1850 August 5, 1850 August 11, 1850 August
Week 33 in 1850 August 12, 1850 August 18, 1850 August
Week 34 in 1850 August 19, 1850 August 25, 1850 August
Week 35 in 1850 August 26, 1850 September 1, 1850 August / September
Week 36 in 1850 September 2, 1850 September 8, 1850 September
Week 37 in 1850 September 9, 1850 September 15, 1850 September
Week 38 in 1850 September 16, 1850 September 22, 1850 September
Week 39 in 1850 September 23, 1850 September 29, 1850 September
Week 40 in 1850 September 30, 1850 October 6, 1850 September / October
Week 41 in 1850 October 7, 1850 October 13, 1850 October
Week 42 in 1850 October 14, 1850 October 20, 1850 October
Week 43 in 1850 October 21, 1850 October 27, 1850 October
Week 44 in 1850 October 28, 1850 November 3, 1850 October / November
Week 45 in 1850 November 4, 1850 November 10, 1850 November
Week 46 in 1850 November 11, 1850 November 17, 1850 November
Week 47 in 1850 November 18, 1850 November 24, 1850 November
Week 48 in 1850 November 25, 1850 December 1, 1850 November / December
Week 49 in 1850 December 2, 1850 December 8, 1850 December
Week 50 in 1850 December 9, 1850 December 15, 1850 December
Week 51 in 1850 December 16, 1850 December 22, 1850 December
Week 52 in 1850 December 23, 1850 December 29, 1850 December

Calendars 1850

January 1850
MoTuWeThFrSaSu
Week 1123456
Week 278910111213
Week 314151617181920
Week 421222324252627
Week 528293031
February 1850
MoTuWeThFrSaSu
Week 5123
Week 645678910
Week 711121314151617
Week 818192021222324
Week 925262728
March 1850
MoTuWeThFrSaSu
Week 9123
Week 1045678910
Week 1111121314151617
Week 1218192021222324
Week 1325262728293031
April 1850
MoTuWeThFrSaSu
Week 141234567
Week 15891011121314
Week 1615161718192021
Week 1722232425262728
Week 182930
May 1850
MoTuWeThFrSaSu
Week 1812345
Week 196789101112
Week 2013141516171819
Week 2120212223242526
Week 222728293031
June 1850
MoTuWeThFrSaSu
Week 2212
Week 233456789
Week 2410111213141516
Week 2517181920212223
Week 2624252627282930
July 1850
MoTuWeThFrSaSu
Week 271234567
Week 28891011121314
Week 2915161718192021
Week 3022232425262728
Week 31293031
August 1850
MoTuWeThFrSaSu
Week 311234
Week 32567891011
Week 3312131415161718
Week 3419202122232425
Week 35262728293031
September 1850
MoTuWeThFrSaSu
Week 351
Week 362345678
Week 379101112131415
Week 3816171819202122
Week 3923242526272829
Week 4030
October 1850
MoTuWeThFrSaSu
Week 40123456
Week 4178910111213
Week 4214151617181920
Week 4321222324252627
Week 4428293031
November 1850
MoTuWeThFrSaSu
Week 44123
Week 4545678910
Week 4611121314151617
Week 4718192021222324
Week 48252627282930
December 1850
MoTuWeThFrSaSu
Week 21
Week 492345678
Week 509101112131415
Week 5116171819202122
Week 5223242526272829
Week 13031

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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 1850 starts on December 31, 1849 and ends on January 6, 1850 (ISO 8601, Monday to Sunday). 1850 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 1850 have?

1850 has 52 ISO weeks.

When does week 1 of 1850 start?

Week 1 of 1850 starts on December 31, 1849 and ends on January 6, 1850 (ISO 8601, Monday to Sunday).

When does the last week of 1850 end?

Week 52 of 1850 starts on December 23, 1850 and ends on December 29, 1850 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 1852, 1857, 1863, 1868, 1874.

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.