Type Property
timeIntervalSinceReferenceDate
iOS 8.0+
iPadOS 8.0+
Mac Catalyst 8.0+
macOS 10.10+
tvOS 9.0+
watchOS 2.0+
The interval between 00:00:00 UTC on 1 January 2001 and the current date and time.
static var timeIntervalSinceReferenceDate: TimeInterval { get }