I want to be able to access multi-day all-day events that have just completed.
Because the calendars I read set the time to 00:00:00 when defining multi-day all-day events an event which ends on a particular day actually vanishes from the calendar integration at midnight the night before.
This relates to Airbnb and the like. If a booking is a two night stay from 10th - 12th then, despite the guest checking out on the 12th I cannot see the entry in the calendar integration after midnight on 11th.