Well, Êndug's chronology is currently based on Ab Urbe Conditem (AUC/AVC), and while the timeline got seriously perturbed, Gaius Julius still rose to power, so he definitely put through the Julian reform before being demised (teaser quote from one of my timeline blurbs in 548AD "...the General, Marcus Antonius Severus (descendant of the great Triumvir who helped lead the Republic through one of its most trying moments some 500 years before) consulted with his advisors...").