Database design for recurring events with exceptions

Question

I\'m building a system that needs to store/manage different types of events. For simplicity, I will focus on designing a calendar (I\'m building something slightly different

Answer 1

Use iCalendar RRules and ExDates

If it's a recurring event, just store the start/end datetimes and RRules and ExDates for the event.

Use a Materialized View to pre-calculate upcoming actual events, say for the next 30 days or 365 days.

As you are using Postgres, you can use existing python, perl, or javascript RRule libraries (such as dateutil) inside pg function for calculating future events based on the rrules and exdates

UPDATE: check out pg_rrule extension: https://github.com/petropavel13/pg_rrule