I propose that imaginary time during the early universe implies an imaginary analog of the speed of light c, the speed of dark id. Using id in Lortentz transformations yields predictions of how events at the transition from imaginary to real time would propagate into the real timeline. If dark matter and energy are measurable effects of events that occurred during the transition from imaginary to real time, an imaginary id replacing c in Lorentz transformations predicts that they should be globally measurable but not locally observable. I focus here on dark matter and show that it is plausible that the apparently much greater mass of dark than regular matter is the consequence applying id in Lortentz transformations at the point of transition from imaginary to real time. Should it be possible to recreate conditions where imaginary time applies, it should be possible to construct an experiment in which predictions using id in Lortentz transformations can be made and tested repeatably.