I gave my phone to my daughter whom deleted all my calander items. My old phone was sync to my new phone, therefore deleted all my items off my new phone calander also. How can I retrieve my lost calander items.
Welcome to Android Central! Since you didn't remove your Google account from your old phone before giving it to your daughter, she had the same control over your account that you do. Hence, anything she deletes on your account will be deleted everywhere else you access your account. You should always remove your account (in Settings>Accounts) before you give or sell your phone to anyone else, and they should then do a factory reset to set it up as their own.