allenporter/ical

Support the time zone component

allenporter opened this issue · 2 comments

allenporter commented

Is your feature request related to a problem? Please describe.
Support parsing and encoding the time zone component. The initial version won't do any fancy date/time timezone lookups yet, but will instead just focus on getting the data model right.

Describe the solution you'd like
See https://www.rfc-editor.org/rfc/rfc5545#section-3.6.5 for implementation details

allenporter commented

At the calendar level: Need to verify that tzid is unique across timezones.

allenporter commented

For verifying tzif is working:

  • Look at a known time range rule and get an interesting set of test dates / offsets to verify
  • Implement a tzinfo implementation based on the underlying tzdata
  • Test original zoneinfo vs synthetic zoneinfo implementation (This is basically to confirm that the times are being implemented correctly)
  • Interpret/build zoneinfo rule for forward looking rules
  • May need to search for other interesting timezone record variations to know if we're implementing it right (e.g. bits set that are different from Los Angeles)