Gregorian Calendar - GetWeekOfYear for 2005

[bp]

I'm using the System.Globaliz ation.Gregorian Calendar class to calculate
week numbers. My weeks begin on Saturday and follow the "first four
day" rule.

GregorianCalend ar cal = new GregorianCalend ar();
week = cal.GetWeekOfYe ar("12/31/2005",
CalendarWeekRul e.FirstFourDayW eek, DayOfWeek.Satur day);

GetWeekOfYear() returns "53" for "12/31/2005", even though there are
only 52 weeks in 2005. "12/30/2005" correctly returns "52", and
"1/1/2006" correctly returns "1".

Can someone explain this to me? Is this intended behavior or is this a
bug in the GregorianCalend ar class?

Thanks in advance.

[Ryan Trudelle-Schwarz]

> I'm using the System.Globaliz ation.Gregorian Calendar class to

calculate week numbers. My weeks begin on Saturday and follow the
"first four day" rule.

GregorianCalend ar cal = new GregorianCalend ar();
week = cal.GetWeekOfYe ar("12/31/2005",
CalendarWeekRul e.FirstFourDayW eek, DayOfWeek.Satur day);
GetWeekOfYear() returns "53" for "12/31/2005", even though there are
only 52 weeks in 2005. "12/30/2005" correctly returns "52", and
"1/1/2006" correctly returns "1".

Can someone explain this to me? Is this intended behavior or is this
a bug in the GregorianCalend ar class?

Thanks in advance.

Check it on a calendar, looks correct to me.
12/30 is a Friday, the end of the 52nd week.
12/31 is a Saturday, the beginning of the 53rd week (1 day week).

[bp]

The project I'm working on is a fiscal calendar that doesn't provide
for "partial weeks" (ie. a week with less than 7 days). In this case I
want "12/31/2005" to be the first day of fiscal week "1" for 2006. The
first week of 2006 would be the week beginning on "12/31/2005" because
that week contains "4 or more" days in January...
I see now that this is not how the GregorianCalend ar works...do you
know if there's another calendar with a GetWeekOfYear() method
supporting this calculation?
Thanks for the response.

[Manohar Kamath]

One way to handle this is check the week of 1/1/2006, and also the DayOfWeek
for 1/1/2006. If it returns 3 or more (wednesday or later), add 1 to the
week count, and thus get the correct fiscal week.

--
Manohar Kamath
Editor, .netWire
www.dotnetwire.com
"bp" <ba*****@i-55.com> wrote in message
news:11******** **************@ f14g2000cwb.goo glegroups.com.. .

The project I'm working on is a fiscal calendar that doesn't provide
for "partial weeks" (ie. a week with less than 7 days). In this case I
want "12/31/2005" to be the first day of fiscal week "1" for 2006. The
first week of 2006 would be the week beginning on "12/31/2005" because
that week contains "4 or more" days in January...
I see now that this is not how the GregorianCalend ar works...do you
know if there's another calendar with a GetWeekOfYear() method
supporting this calculation?
Thanks for the response.