I have done rather more fighting with times than i would wish, but what is happening here is an attempt to use two different labelling systems for time. The first is to pick a 'zero' point and then count seconds from it, like unix time for those who know about that. So you might hav 10,000,000,000 seconds after the chosen origin. The second scheme is to measure time based on cycles round the sun. So the TIME does not need to be altered but the LABELS we use do.