About Epoch 0 being the first one, it's a computer programming thing.
In computing, counting starts from 0. 16 bit: 0-16535. CPUs:
/proc/cpuinfo > processor : 0. Time: 0:00-23:59. Months and days are an exception, although if you use seconds there are no days, and time starts from
Unix Epoch Time 0 (GMT: Thursday 1 January 1970 00:00:00).