Calendars you own or have edit and manage permissions to.You can check your availability from secondary calendars, such as: Booked appointments are never hidden on the Calendar grid. If an appointment schedule is hidden and you create a new schedule or add time to one, the hidden appointment schedules will show again. Under the “View Switcher” menu, you can hide appointment schedules.Learn more about premium features for appointment schedules. To check availability from secondary calendars, you need to have an eligible Google Workspace or Google One plan.When you set up or change an appointment schedule, you can select which calendars should be reviewed for conflicts. To prevent double bookings, Calendar can check your availability across multiple calendars (including your primary calendar and any calendars that you own, manage, or are subscribed to).