Spam has attached to my Dh’s calendar on his iPad.

Thank you all for answering. Blossoming. I did as you said and saw something with a lot of letters etc that I didn’t recognise. Perhaps that was it! So I deleted the account as we don’t use the calendar and if it attracts spam as it did on my iPad as well feel we are better off without it. Thank you so much. I am crossing fingers that it doesn’t appear again.
Thank you * Casdon* for your suggestion. That is also useful.

Go into ‘Settings’ on the iPad. Scroll down to Calendar, then tap on Accounts. Any ‘rogue’ calendars that you’ve inadvertently subscribed to will be listed here and you can delete them.

I’ve had this, and the only way to resolve it was to wipe and reset my iPad. All the apps etc. reloaded, so there was no problem doing it that way.

Report to Apple.