Marvelous; my undertaking Is ,1st if you received the urantia book & closely look in its teaching you might have come to know the phrase in use their!!! But with newbies can not notice what we already have in the revelation? Well Epochal come from word epoch which mean a set period of time when, a event or revelation / dispensation take place / happen according to time table of celestial program, Urantia is the 5th Epochs of the series of said events / missions, the 1st was the time of Dalamantia, 2nd was of Adam & eve the 3rd was with machiventa Melchizedek, 4th was of jesus of Nazareth & this 5th is for Christ Michael, revelation.
