Kern Sibbald wrote:
> On Thursday 03 August 2006 13:25, Alan Brown wrote:
>> On Wed, 2 Aug 2006, Erik P. Olsen wrote:
>>
>>>> Schedule {
>>>>           Name = "EveryOtherTuesday"
>>>>           Run = Level=Full tue w00,w02,w04,w06,w08,w10,w12(etc to
>>>> week 52) at 22:00
>>>> }
>>> Some years have 53 weeks!
>> Every year has part of a 53rd week.
>>
>> A Calendar year is 52 weeks and one day - or 52 weeks and 2 days on a leap 
>> year.
>>
>> Put another way, it's 13 lunar (4 week) months and one/two days
>>
>> The 1 day fuzz isn't going to matter - and if it does, just end 
>> with w52,w53
> 
> If I remember right, Bacula uses the ISO week number definition standard, 
> which has only 52 weeks, so w53 is probably not valid.  However, if I am not 
> mistaken, the w00 is not ISO, and I put that in to cover the days before the 
> first official ISO week -- i.e. the last part at the end of the year (or the 
> first part before the beginning of the year).
> 

No, look at Jan 1st 2005, that day falls in week 53 of year 2004 according to 
ISO standard because it was a Saturday and hence the Tursday of that week fell 
in 2004. w53 is indeed valid at least in the ISO standard.

If Dec 31st is not a Sunday w52 or w53 will stretch into the following year. Is 
it so that w00 then is defined as the part of w52 or w53 which falls before Jan 
1st?

-- 
Erik P. Olsen, Civilingeniør, MSc
Solsortvej 30, DK-2000 Frederiksberg, Denmark
Phone: +45 38346480, Fax: +45 38346470, Mobil: +45 40765300

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