# Recurrence Rules (RRule)

Recurrence rules are a [standardized](https://datatracker.ietf.org/doc/html/rfc2445#section-4.8.5.4) way to define the schedule for a recurring event like an <code class="expression">space.vars.automation</code> Trigger. <code class="expression">space.vars.Kizen\_company\_name</code> provides a simple, easy to use UI set up recurring events, but for advanced or complex cases you may enter RRULEs directly.

For example, if you wanted your <code class="expression">space.vars.automation</code> to run on the second Monday and last Friday of each month:

```apache
RRULE:FREQ=MONTHLY;INTERVAL=1;BYDAY=2MO,-1FR
```

There are a number of community-maintained and official [tutorials](https://www.nylas.com/blog/calendar-events-rrules/), [calculators](https://icalendar.org/rrule-tool.html), and [validators](https://balsoftware.net/rrule/) you can use to create advanced schedules.


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