SDSFoundationExtension extensions for Foundation DurationStyleDayHourMinute show duration like "?days ??:??:??" let duration = Duration(secondsComponent: Int64(60.0*60.0*24.0*4.5), attosecondsComponent: 0) XCTAssertEqual(duration.formatted(DurationStyleDayHourMinute()), "4days 12:00:00")