Lupin wrote:
The joys of a fictional world is that you don't need a time frame. Even Gundam uses their own worlds just to avoid such things like that. Each 12 (guessing) series are divided into 3 or 4 universes. In each universe everything corresponds. This is ur universe so you can do whatever you please without respect to modern technological evolution etc. (Think of how Final Fantasy games mostly use swords and archaic weapons, there are knights, No electricity, however they have airships. *Shrugs*).
Unless, its a corresponding timeline like Star Trek. To which case, referencing and cross-referencing (not to mention prediction) usually take a great deal of time to finish. In effect, a number of Gundam series do a good job of corresponding with past time and probable events to lead to a futuresque timeframe.
To each his own, and to each their own writing style.