Google Calendar makes it difficult to have multiple public calendars - if someone looks up your public calendar, they only see the events on your default calendar. If you use multiple calendars to organize your schedule, this means not all your events will be visible. Additionally, if you use a remote calendar (such as iCloud), you can't make any events publicly show as busy.
This program takes several input calendars and merges them into on "curated" calendar. It handles event creation, updates, and deletion. It does this non-destructively by tagging curated events, so that your gcal invites won't be touched.
It works well when run on a time trigger (such as every night). It takes betwee 0.5-1.0 seconds per event copied, and so can generally handle several months or weeks before running into rate limits.
daysToCopy- how far ahead to look from the current datecal_default- GASCalendarobject to copy tocals- an array of GASCalendarobjects to copy from
See the Apps Script CalendarApp Documentation for more information.