If an appointment type is offered on more than one calendar, clients are automatically given the option to select which calendar they’d like to book an appointment on, or opt for any available to be assigned an available calendar at their chosen time.
By default, when the client chooses any available calendar, Acuity will distribute the appointments round robin, starting by sending appointments to the calendar with the least number of appointments that day.
There are a few other ways to display calendars on your client scheduling page. If you go to Clients Scheduling Page > Customize Appearance > Scheduling Page Options you can:
Since calendars will be prioritized alphabetically when you choose the option Calendars: Prioritize Calendars with "Any Available" Instead of Round Robin, and calendars are automatically listed in alphabetical order, we'll have to do a little tweak to make your calendars prioritize correctly! To do this, add spaces in front of calendar names to put them at the top of the list. In this case, here's how it'll look:
_ _ Person 3
_ Person 2
Person 1
* (each _ is one space -- so you'll replace each _ with a space)
This way, Person 3 will be prioritized first, then 2, then 1.
Keep in mind: These options will only be available under the Scheduling Page Options area once more than one calendar has been created. If there's only one calendar in your account these options won't display until an additional calendar is added.