Some one Hacking my phone and I have Virus on my phone

No, your phone is not hacked.

No, your phone does not have a virus.

You unknowingly subscribed to a spam calendar.

If running iOS 13 or earlier versions, check: Settings - Passwords & Accounts - Accounts - Any rogue entries here? If so, delete the rogue account. 

If running iOS 14, check: Settings - Calendar - Accounts - Any rogue entries here? If so, delete the rogue account. 

The Apple support article is below. 

https://support.apple.com/en-us/HT211076

don't worry! it doesn't seem like a virus, especially if it's just on your calendar as you showed. you probably just accidentally clicked on a link that subscribed you to a spam calendar, which can be easily fixed by unsubscribing to the calendar.