Before you start...
Start time increments are fixed and are only available up to every 60 minutes. If you need to set specific available start times, we suggest you set intervals or time frames that you are available to take a meeting. You can do this from editing your schedule or setting custom hours.
From your Calendly Home page, locate the event you want to edit and select it.
Expand the When can this event be booked? section.
At the bottom of the section, select Additional rules for your availability.
At Start time increments, select the frequency. The shorter the frequency, the more start time options your invitee sees.