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Foundation / Date / -=(_:_:)

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Declaration
Discussion
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-=(_:_:)

Subtract a TimeInterval from a Date.

Declaration

static func -= (lhs: inout Date, rhs: TimeInterval)

Discussion

warning:

This only adjusts an absolute value. If you wish to add calendrical concepts like hours, days, months then you must use a Calendar. That will take into account complexities like daylight saving time, months with different numbers of days, and more.

See Also

Adding or Subtracting a Time Interval

addTimeInterval(_:)
addingTimeInterval(_:)
+(_:_:)
+=(_:_:)
-(_:_:)

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FoundationOperator

iOS 8.0+iPadOS 8.0+Mac Catalyst 8.0+macOS 10.10+tvOS 9.0+visionOS 1.0+watchOS 2.0+

Declaration
Discussion
See Also

Built on 2026-05-07