On 9 Jun, 07:40, Ivan Velev <[EMAIL PROTECTED]> wrote: > Thanks Paul, > > I have identified the "problem" - because of daylight change this > particular timesamp was observed twice in Europe/Sofia. Here is the > GMT-to-local-time conversion: > > +------------+---------------------+---------------------+ > | gmt_stamp | gmt_time | local_time | > +------------+---------------------+---------------------+ > | 1130631000 | 2005-10-30 00:10:00 | 2005-10-30 03:10:00 | > +------------+---------------------+---------------------+ > | 1130634600 | 2005-10-30 01:10:00 | 2005-10-30 03:10:00 | > +------------+---------------------+---------------------+ > | 1130638200 | 2005-10-30 02:10:00 | 2005-10-30 04:10:00 | > +------------+---------------------+---------------------+ > | 1130641800 | 2005-10-30 03:10:00 | 2005-10-30 05:10:00 | > +------------+---------------------+---------------------+
I still don't understand why the "problematic" timestamp would affect the latter operation, though. I can see that both timestamps could be valid depending on which time zone is supposed to be in operation - have the dates for daylight saving (summer vs. winter) time changed in Bulgaria in the last few years? Maybe asking for a conversion for a date in 2004 invokes some old rules which then affect a conversion for a date in 2005, even though that would be really bad behaviour (which I don't see on this machine here). > When you do local-time-to-GMT conversion you can expect any of those > two timestamps. I missed that initially :( (I was sure that local time > has "one hour gap" and not "one hour of overlapping time") Well, it really isn't overlapping as such: you're in different zones, of course. ;-) > > and I'd recommend the datetime module for any serious work with dates and > > times. > > Last time when I was playing with TZ conversions, I was not able to do > anything using datetime module - it seems that one needs to define his > own set of timezones (+ all the details) to get it working ... Am I > wrong ? Can you show me how do accomplish the same conversion using > datetime module ? I think it's easiest to install one of the libraries which provides the zone data. The first one that comes to mind is python-dateutil, but I think there are others. Paul -- http://mail.python.org/mailman/listinfo/python-list