I lost all the information and appointments in my calendar , is there a way I can retrieve this info or get it back??

Where is the calendar events stored on your iPhone? Please add the email account, that's it.

See the iPhone and Mac Calendar Pics below

When you add events to the Calendar it gets added to the Default Calendar set on your device.

See the pic below

What were you syncing your calendar with?

Items don't just disappear. What happened?