Why is there an invitation schedule in the mobile phone calendar?

If you need to use iCloud's calendar function every day, it is obviously impractical to turn it off. However, you can prevent the direct push of calendar events by modifying the way calendar invitations are received. Log in to iCloud in your computer browser, then go to calendar management settings, click the gear icon in the lower left corner, and change "Receive invitations for events" to "Send e-mail to" in Preferences-Advanced. In this way, you will not receive push notifications on iOS devices in the future, but in the mailbox. You can set filtering notifications directly in your mailbox, so that you won't be affected by spam.