[icalendar-dev] Handling timezones in dtstart/dtend

[Tessa Lau]

Hi,

I'm really happy to see that someone's writing an iCalendar library
for Python!  I've done my share of writing simple ical parsers and
generators, so I appreciate the effort that's gone into this.

I'm running into a problem with parsing iCalendar data files generated
by Lotus Notes (example attached).  These calenders specify the
datestart and dateend using a custom timezone that's defined earlier
in the .ics file.  However, the parser doesn't seem to handle these
timezones correctly, and gives me a naive datetime object rather than
a timezone-aware datetime.

What I think should happen is that the parser should recognize that
the timezone is specified as a parameter on the dtstart property, and
retrieve that timezone from where it was specified earlier in the
calendar data.

Alternatively, I can look for the presence of this TZID property, and
parse out the timezone info myself, and convert the naive datetime to
an aware datetime.  However, it seems like this should be handled by
the iCalendar library.

What do you think?

Thanks,
--Tessa
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