Do you know how may I deleted this? And im not sure what is this I guess it’s a virus

It is a rogue calendar subscription. If you go to Calendars at the bottom of the screen there, do you see a calendar listed that matches the color of these events? If you see a strange calendar there under Other or Subscribed, can you uncheck it? then you may want to check it seems they will add a strange mail account. Go to Settings>Passwords & Accounts and see if you find a strange email account there. It may be where the calendar syncing is coming from. Delete the account there. You will also want to check Settings>General>Profiles and see if there is anything unusual listed there.

Read the replies in this similar thread:--> Spam in my calendar - Apple Community

Regards

Giulio

there is a way

click on setting then password and accounts check for any unusual account was setup on the device then remove it

this should fix the issue for you