"Error: Appointment start time cannot be in the past" when trying to schedule a future appointment

Overview

You are trying to schedule an appointment in the future, but you are receiving an error stating that "appointment start time cannot be in the past". 

Solution

This issue can occur when the time zone data is not set. Ensure that your personal time zone is set under Settings > Preferences. See How to set your own time zone in Playbooks for more information.