# 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 Automation 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 automation 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.