A number of iCloud services were experiencing outages Sunday morning, including Calendar, Contacts and iCloud Drive, according to Apple's System Status webpage. The service disruptions began around 6 a.m. PT, according to the page.
By midafternoon Sunday, the problems seemed to have been resolved. As of Monday morning, the System Status page showed green lights across the board, and services that had experienced problems showed a "resolved issue" notation.
Services affected by the outages included Find My, iCloud Account & Sign In, iCloud Backup, iCloud Bookmarks & Tabs, iCloud Calendar, iCloud Contacts, iCloud Drive, iCloud Keychain, iCloud Mail, iCloud Storage Upgrades, Photos and Screen Time.
During the outage, some messages on the status board said the service may be slow or unresponsive, while others said users were unable to login.
Apple didn't respond to a request for comment.