One entry instead of dozens
A weekly team meeting entered manually 52 times a year is 52 chances to mistype the time, forget a week, or lose track of which instance you already edited. A recurring event is a single source of truth: change the time once and every future occurrence updates together, while still letting you edit or delete just one instance without touching the rest.
Custom patterns cover the messy real-world schedules
Not every routine fits neatly into "every day" or "every week." Custom recurrence rules -- specific weekdays, every other week, the last Friday of the month -- exist because real schedules like alternating shifts, biweekly payroll, or a class that only meets twice a week don't fit the basic presets.
Frequently Asked Questions
Can I edit just one occurrence of a recurring event without changing the whole series?
Yes -- most calendar apps ask whether a change applies to "this event only" or "all events" whenever you edit or delete one instance of a recurring series.
What happens to a recurring event after its end date passes?
It simply stops generating new occurrences on your calendar; past instances remain untouched in your history, and you can always edit the series later to extend or change the end condition.