Week numbers 228

228 has 52 ISO weeks. Week 1: Dec 31, 227 – Jan 6, 228 · Week 52: Dec 22 – 28

228 at a glance

Weeks in 22852
Week 1December 31, 227 – January 6, 228
Week 52December 22, 228 – December 28, 228
Days in 228366
Leap yearYes

All Weeks in 228

Week From To Month
Week 1 in 228 December 31, 227 January 6, 228 December / January
Week 2 in 228 January 7, 228 January 13, 228 January
Week 3 in 228 January 14, 228 January 20, 228 January
Week 4 in 228 January 21, 228 January 27, 228 January
Week 5 in 228 January 28, 228 February 3, 228 January / February
Week 6 in 228 February 4, 228 February 10, 228 February
Week 7 in 228 February 11, 228 February 17, 228 February
Week 8 in 228 February 18, 228 February 24, 228 February
Week 9 in 228 February 25, 228 March 2, 228 February / March
Week 10 in 228 March 3, 228 March 9, 228 March
Week 11 in 228 March 10, 228 March 16, 228 March
Week 12 in 228 March 17, 228 March 23, 228 March
Week 13 in 228 March 24, 228 March 30, 228 March
Week 14 in 228 March 31, 228 April 6, 228 March / April
Week 15 in 228 April 7, 228 April 13, 228 April
Week 16 in 228 April 14, 228 April 20, 228 April
Week 17 in 228 April 21, 228 April 27, 228 April
Week 18 in 228 April 28, 228 May 4, 228 April / May
Week 19 in 228 May 5, 228 May 11, 228 May
Week 20 in 228 May 12, 228 May 18, 228 May
Week 21 in 228 May 19, 228 May 25, 228 May
Week 22 in 228 May 26, 228 June 1, 228 May / June
Week 23 in 228 June 2, 228 June 8, 228 June
Week 24 in 228 June 9, 228 June 15, 228 June
Week 25 in 228 June 16, 228 June 22, 228 June
Week 26 in 228 June 23, 228 June 29, 228 June
Week 27 in 228 June 30, 228 July 6, 228 June / July
Week 28 in 228 July 7, 228 July 13, 228 July
Week 29 in 228 July 14, 228 July 20, 228 July
Week 30 in 228 July 21, 228 July 27, 228 July
Week 31 in 228 July 28, 228 August 3, 228 July / August
Week 32 in 228 August 4, 228 August 10, 228 August
Week 33 in 228 August 11, 228 August 17, 228 August
Week 34 in 228 August 18, 228 August 24, 228 August
Week 35 in 228 August 25, 228 August 31, 228 August
Week 36 in 228 September 1, 228 September 7, 228 September
Week 37 in 228 September 8, 228 September 14, 228 September
Week 38 in 228 September 15, 228 September 21, 228 September
Week 39 in 228 September 22, 228 September 28, 228 September
Week 40 in 228 September 29, 228 October 5, 228 September / October
Week 41 in 228 October 6, 228 October 12, 228 October
Week 42 in 228 October 13, 228 October 19, 228 October
Week 43 in 228 October 20, 228 October 26, 228 October
Week 44 in 228 October 27, 228 November 2, 228 October / November
Week 45 in 228 November 3, 228 November 9, 228 November
Week 46 in 228 November 10, 228 November 16, 228 November
Week 47 in 228 November 17, 228 November 23, 228 November
Week 48 in 228 November 24, 228 November 30, 228 November
Week 49 in 228 December 1, 228 December 7, 228 December
Week 50 in 228 December 8, 228 December 14, 228 December
Week 51 in 228 December 15, 228 December 21, 228 December
Week 52 in 228 December 22, 228 December 28, 228 December

Calendars 228

January 228
MoTuWeThFrSaSu
Week 1123456
Week 278910111213
Week 314151617181920
Week 421222324252627
Week 528293031
February 228
MoTuWeThFrSaSu
Week 5123
Week 645678910
Week 711121314151617
Week 818192021222324
Week 92526272829
March 228
MoTuWeThFrSaSu
Week 912
Week 103456789
Week 1110111213141516
Week 1217181920212223
Week 1324252627282930
Week 1431
April 228
MoTuWeThFrSaSu
Week 14123456
Week 1578910111213
Week 1614151617181920
Week 1721222324252627
Week 18282930
May 228
MoTuWeThFrSaSu
Week 181234
Week 19567891011
Week 2012131415161718
Week 2119202122232425
Week 22262728293031
June 228
MoTuWeThFrSaSu
Week 221
Week 232345678
Week 249101112131415
Week 2516171819202122
Week 2623242526272829
Week 2730
July 228
MoTuWeThFrSaSu
Week 27123456
Week 2878910111213
Week 2914151617181920
Week 3021222324252627
Week 3128293031
August 228
MoTuWeThFrSaSu
Week 31123
Week 3245678910
Week 3311121314151617
Week 3418192021222324
Week 3525262728293031
September 228
MoTuWeThFrSaSu
Week 361234567
Week 37891011121314
Week 3815161718192021
Week 3922232425262728
Week 402930
October 228
MoTuWeThFrSaSu
Week 4012345
Week 416789101112
Week 4213141516171819
Week 4320212223242526
Week 442728293031
November 228
MoTuWeThFrSaSu
Week 4412
Week 453456789
Week 4610111213141516
Week 4717181920212223
Week 4824252627282930
December 228
MoTuWeThFrSaSu
Week 491234567
Week 50891011121314
Week 5115161718192021
Week 5222232425262728
Week 1293031

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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 228 starts on December 31, 227 and ends on January 6, 228 (ISO 8601, Monday to Sunday). 228 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 228 have?

228 has 52 ISO weeks.

When does week 1 of 228 start?

Week 1 of 228 starts on December 31, 227 and ends on January 6, 228 (ISO 8601, Monday to Sunday).

When does the last week of 228 end?

Week 52 of 228 starts on December 22, 228 and ends on December 28, 228 (ISO 8601, Monday to Sunday).

Which years have 53 weeks?

The next years with 53 ISO weeks are 229, 235, 240, 246, 252.

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.