Google Calendar event change doesn't get picked up

[climategadgets]

Expected Behavior

When an event in Google Calendar is changed, the change is picked up during the next poll.

Actual Behavior

The only way the change will be picked up is if event name, start time, end time, or recurrence change.

Root Cause

SchedulePeriod doesn't include the notion of "last modified".

Workaround

Restart the system to pick up the schedule update. Ugly, but works.