Hi Shawn, http://pytz.sourceforge.net/ looks like it would be useful for converting time zone strings.
The one thing I keep hearing, though, whenever anyone brings up time zones here on django-users is: "*ALWAYS* store dates in UTC, then convert as needed". Don't know how useful that is, but for what it's worth, *whump*, there it is. :) ---Peter Herndon On Apr 27, 2010, at 3:09 PM, Shawn Milochik wrote: > Given a date/time value and a value that is valid for the TIME_ZONE setting > in settings.py, how do I convert that date/time to the time zone defined in > settings.py? > > Example: > settings.py contains: > TIME_ZONE = 'America/New_York' > > Input contains: > date/time value "13:00" > time_zone = "America/Los_Angeles" > > Desired: > timedelta of the +/- difference needed to convert 13:00 PST to > 16:00 EST > > It would be easy to create a dictionary of these values and their UTC offsets > and just use that. But before I potentially reinvent a little wheel, I was > wondering if this conversion was already being handled in Django. > > By looking at the Django codebase I've found the tzinfo file, but it expects > to receive a timedelta as input, and doesn't actually use the TIME_ZONE > value. Further grepping seems to indicate that the string values (such as > 'America/New_York') are only passed to the database engines when creating a > connection object so that the database itself can handle the time zones, and > expects the dates it receives to already have been converted to that zone. > > It appears that the time and datetime Python libraries also use offsets and > US-centric values such as PST and EST for time zones, and not the verbose > names accepted by settings.py and PostgreSQL. > > Thanks, > Shawn > > -- > You received this message because you are subscribed to the Google Groups > "Django users" group. > To post to this group, send email to django-us...@googlegroups.com. > To unsubscribe from this group, send email to > django-users+unsubscr...@googlegroups.com. > For more options, visit this group at > http://groups.google.com/group/django-users?hl=en. > -- You received this message because you are subscribed to the Google Groups "Django users" group. To post to this group, send email to django-us...@googlegroups.com. To unsubscribe from this group, send email to django-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/django-users?hl=en.
