These settings will determine start and end time of your events in your Google Calendar.
For the moment, all your events will have the same start and end time (it will change if time selection is added to Easy Booking in the future).
Here you can select a custom color for your events. It can be different from your Calendar color.
In Settings > General > Timezone, make sure to select a city and not any “UTC” or “Manual offset” settings or it will not work.
Google Calendar API requires a string formatted as an IANA Time Zone Database name, e.g. “Europe/Zurich”.