The time frame 12,000 years is important to our civilization because that's when we started to get into agriculture in a big way.
..and that is why the 12,000 year old date is significant.
Atlantis sank about 10500 years ago. I think Atlanteans practiced agriculture long before that.
I'd say that time frame is important, because that's probably around the time the Giza pyramid was built, and the last 'Golden Age' happened in
Egypt as a result (the pyramids, as we all know, were constructed for initiation, so that people could evolve spiritually and become a harmonic race,
free from their animal (beastly) side - so they could properly rise from 6 (the beast) to 7 (the human)).
Sigh.. that was a great time.. I often remember it with great warmth (you can feel the incredible joy and happiness the workmen in fields were
completely consumed by, by looking at certain hieroglyphic paintings - it's amazing).. that was the one time in the history of this pityful human
race when -everything- was okay. Everything was good.
The priests, who fled Atlantis, were the basis for the whole Egyptian culture and the golden age..
But alas, as humans started learning intellectual stuff, their lower spiritual abilities diminished. That started the 'current era', when people
were evolving intellectually at a fast pace, while diminishing spiritually and even emotionally. This was a good thing, because not many people could
handle simultaneous lower spiritual abilities and developed intelligence. But it also lead to quite difficult times.
There's a lot that could be said about this age and all - I just wanted to point out that you are right - that 10000-12000 years ago-time window was
very important for our current 'era' (I cannot use the word "civilization" to describe this barbarization). But the priests and other higher
beings saw what was to come, and pretty much fled the whole planet, before it became just a battle ground for two-legged half-animals.. which it still
Agriculture existed long before that, of course.. but of course this era's historians cannot understand the goings-on of the previous era.. they
don't have a clue - and they don't know a thing about spirituality, initiations, or chakras or any of that stuff. How could they hold the key to the
truth to what ACTUALLY happened anyway? They can't. So they figure out their own theories.
The thing is, they weren't there (or they could've been in previous incarnations, but they probably don't remember it)... so you shouldn't trust
them blindly. Research for yourself, and keep your chakras and mind open for any information you might encounter.. don't dismiss quickly, but process
instead, and try to fit the pieces together before discarding. And even then, leave a possibility open for it.. for who knows, perhaps in the future,
knowledge will appear that fits the previously discarded bits.
But I agree in that it was an important time.