I have a co-worker who set up a calander for classes and was recently let go. Her account is still active, but I need to get to her calander to share with the new employee taking over her job. When sharing permissions were set up I was only given editor permissions. Is there anyway to share with the rest of the office?

The only way would be to log on as your former co-worker into her account and set the permissions appropriately. Your system administrator might be able to assist.