unfortunately, no support. i believe that the egg’s hatchdate/time is recorded in the history of the pokemon. so putting the delta time will be the same as the time the egg is hatched? so it seems a little unnecessary and redundant to put such a feature. i personally don’t think it’s going to be useful, even if it was a delta special (shiny, albino, etc.) because frankly i don’t really care about when it was hatched or such.