Recurring events with an end date, when uploaded, are missing the entry on the last day in Google Calendar

[Adam J. Lincoln]

This problem is related to the lack of timezone information in the UNTIL=YYYYMMDDT000000Z specification in the recurrence information uploaded to Google Calendar. The time should reflect the event's start time in UTC, and nowhere is this offset calculated/stored in pygpal. (The timezone name is known for each calendar - perhaps tzinfo can tell us from that?)