Both Zimbra and Google support multiple calendars; the difference with Google is that everything is directly connected to email addresses.

In Google, you have a Primary calendar which has the same "name" as your email account - for example, abc123@humboldt.edu. The important thing to remember is that this is the ONLY calendar that affects your free/busy time;You can add other calendars to this account to act as reminders for birthdays and other events that don't affect your free/busy time - see Creating New Calendars on the main calendar migration page.

If you have a departmental email account that shares email across your department, this will have a departmental calendar attached to it in Google the same way that your HSU email address has your Primary calendar attached to it. You can move this calendar across using the same import procedures as for your primary calendar. If you don't have a departmental email account, you can request one.

If you are in charge of a conference room or location that people can reserve using a calendaring system, this type of calendar can be created for you in Google Apps so that you can approve or deny reservation requests. If you need this, please request a resource calendar; you can then import existing reservations using the regular calendar import process.