iCloud Calendar users have been dealing with a lot of spam since last week and Apple is working on a fix. The spam involves receiving illegitimate Calendar event invitations. Apple will address the problem by “identifying and blocking suspicious senders and spam in the invites being sent.”
Spam isn’t an entirely new issue in iCloud Calendar, but its prevalence increased significantly last week.
This spam issue applies to those using the service directly and those who have connected their iCloud Calendar to an app like Fantastical.
There is currently an inconvenient workaround to deal with the spam.
