If you are using any CI tools, you may prefer to have those trigger tests automatically. We describe the process in this article
You configure scheduling a test by navigating to the Tests page and selecting a created test from the tests page. The time zone for scheduling will be dependent on the Time Zone you've selected under your User Profile Settings
Next, you can select Schedule from top menu
Test schedule pop-up window will appear
Click Save schedule upon completing test scheduling configurations for selected test.
Finally, you may want to setup Notifications to be aware when a test has been started and completed.