US Week Numbers - USian Advice Needed

Gary Greene greeneg at
Thu May 5 02:04:05 BST 2011

On 4 May 2011, at 3:03 PM, John Layt wrote:

> Hi,
> I'm implementing support for US week numbers, but there's conflicting 
> information on the great interweb tubes as to what the standard is.
> Some sources say the US Standard is Week 1 is from Jan 1 to the first Saturday 
> of the year (which may be less than 7 days) then each following week starts 
> from Sunday.
> Other sources say Week 1 starts on the first Sunday in the year, with the days 
> preceeding it being labelled either Week 0 or the last week of the previous 
> year.
> Finally there's some suggestion the US military uses simple week numbering, 
> i.e. week 1 starts on Jan 1 and lasts 7 days, with each week following in 
> order.
> All 3 may even be in regular use and so all will require support.
> A lot of this confusion seems to stem from our dear friends in Redmond who's 
> aversion to standards leaves them equally unable to correctly implement the US 
> Week as the ISO Week.
> Beatings with the clue-stick gratefully received.
> John.

<ducking and bowing out of the whole "USian vs. American" discussion....>


While I'm odd and view the week as starting on Monday (don't ask, don't want a debate on my views...) the common perception in the US is that the first full week of January is week 1.

Gary L. Greene, Jr.
Developer and Project Lead for the AltimatOS open source project
Volunteer Developer for the KDE open source project
See and for more information

Please avoid sending me MS Office attachments.

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