The time when the record was last saved to the server.
- iOS 8.0+
- macOS 10.10+
- Mac Catalyst 13.0+
- tvOS 9.0+
- watchOS 3.0+
The modification date reflects the time at which a record with the current record’s ID was last saved to the server. For new instances of this class, the value of this property is initially set to
nil. When you save the record to the server, the value is updated with the appropriate modification date for the record.