Currently there is no way to see what epoch date coordinate systems are using in the core ESRI products (ArcGIS Pro, Explorer, and Collector). Likewise, besides being able to see the default epoch date for a coordinate system, it would be nice to be able to adjust the epoch date for a coordinate system on the fly, or at least be able to specify the epoch dates to use when re-projecting data from one coordinate system to another coordinate system.
