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## Resource: Recurring Events

## Article: Recurring Events

## Article Link: https://dev.wix.com/docs/api-reference/business-management/calendar/events-v3/recurring-events.md

## Article Content:

# Recurring Events

Recurring events repeat based on a pattern defined by a `recurrenceRule`.
For example, weekly yoga classes or regular staff working hours. To create a
recurring event, specify a `recurrenceRule` when
[creating an event](https://dev.wix.com/docs/rest/business-management/calendar/events-v3/create-event.md). 
This event, known as a `MASTER` event, defines the recurrence for the series. Wix
Calendars then automatically generates `INSTANCE` events in the series.

## Recurrence Rule

The `recurrenceRule` sets the repeat pattern for recurring events, with the
following properties:

- `frequency`: The interval unit for recurrence. Currently, only `WEEKLY` frequency is supported.
- `interval`: Determines how often the event recurs. For example, every week or every 2 weeks.
- `days`: Specifies the days of the week the event occurs. For example, `MONDAY`.
- `until` (optional): Sets an end date to stop repeating.

## Instances and Exceptions

Individual occurrences in a recurring series are automatically generated and
have a `recurrenceType` of `INSTANCE`.

If an instance is modified (for example, to adjust the time or location), it
becomes an `EXCEPTION`. Even if the `EXCEPTION` is later updated to revert the
modifications, its `recurrenceType` remains `EXCEPTION`. The event's `id`
remains constant throughout its lifecycle.

However, the ID of an `INSTANCE` event may change. This can happen, for example,
when the relevant `MASTER` event's `recurrenceRule` is modified.

## Update `MASTER` events

Changes made to a `MASTER` event only affect future `INSTANCE` events, while past
instances remain unchanged to preserve historical accuracy. Use
[Update Event](https://dev.wix.com/docs/rest/business-management/calendar/events-v3/update-event.md)
to modify the `MASTER` event.

### Split recurring event

If you want to apply modifications starting from a specific future date that's after
the very next `INSTANCE` event, use
[Split Recurring Event](https://dev.wix.com/docs/rest/business-management/calendar/events-v3/split-recurring-event.md)
first. This splits the original `MASTER` event into 2, shortening the original
and creating a second `MASTER` event. Then, use
[Update Event](https://dev.wix.com/docs/rest/business-management/calendar/events-v3/update-event.md)
on the new `MASTER` event to apply your adjustments.