Okay so in the original Final Fantasy VII the year is apparently 0007 (lol it matches the number of the game) and Crisis Core is set in the year 0000 when Aerith is 15. First I ever seen the year mention was in the Final Fantasy wiki.
Now my question is, how on earth can "0000" be a year and if it then what the heck came before it? The year "-0001?" o.o