On Oct 9, 2:58 am, Dennis Lee Bieber <[EMAIL PROTECTED]> wrote: > On Mon, 08 Oct 2007 10:41:03 -0700, "[EMAIL PROTECTED]" > <[EMAIL PROTECTED]> declaimed the following in comp.lang.python: > > > > > There are only 25 timezones: -12, -11, ... -1, 0 (GMT), +1, ... +11, > > +12. > > Uhm... -12 and +12 would be the same, wouldn't they?
No, they are seperated by the International Date Line, so although zones -12 & +12 have the same clock time, they are different dates. > > There are only 24 divisions 15deg wide in longitude, 7.5deg to each > size of zone center, and Greenwich is center of 0... And zones -12 & +12 are each nominally 7.5deg wide, so 23*15 + 2*7.5 gives you 25 zones spanning 360deg. > > However, consider that the former Soviet Union is reputed to have > used only ONE timezone for the entire width of the country (sunrise at > 6AM say in Moscow would be near sunset on the east coast) When was this, in the days before air travel when it took 3 weeks to cross Siberia by train? > > So while there are only 24 hourly offsets, there can be many "zones" > to reflect variations in daylight time changes or non-standard > offsets... The point I was trying to make is that although there may be 400 zones, there aren't 400 offsets. And aren't these offsets part of the timezone record? > -- > Wulfraed Dennis Lee Bieber KD6MOG > [EMAIL PROTECTED] [EMAIL PROTECTED] > HTTP://wlfraed.home.netcom.com/ > (Bestiaria Support Staff: [EMAIL PROTECTED]) > HTTP://www.bestiaria.com/ -- http://mail.python.org/mailman/listinfo/python-list