AND

Know... DNA.

A C G T = your DNA letters
1 3 7 20 = their numbers

7 4 1 3 = Pacals tomb numbers
G D A C = their letters

Rearrange DNA to match...

G (T) A C
7 20 1 3

~ where are the differences?

Depends on what you choose to see.

I see upside down.
That G is seven upside down.
Therefore, that 7 is L
that means that date is

12.2013

The pattern is 'flip' AND 'switch'.
L is 12 (english alpha) and 'switched 12 to mirror' is 21

So, your DNA, in my opinion = 12.21.2013

Now go figure...
The difference is simply three...

One group, kept the fours inside.
The other group keeps the 7 inside.

AND ...
the other group saw them both.
And checked both sides...

12.21.2013 = 3333 (sum stack left, sum stack right)

7413
7431
1347
3147

sum... stacked them both

2008, 2009, 2010, 2011, 2012
vote...........................vote
games........................games

on to on = 5 years.
but the way we use our math in counting, it looks like 4

7413
7431
1347
3147

~lifting threes...
3 3 3 3 = 12

The rest...
741
741
147
147 +
====
1776


1776 x 12 = 21312


21312
BACAB

~ is this a stretch of mind?
It certainly IS.

Wiki:
The Bacab "were four brothers whom God placed, when he created the world, at the four points of it, holding up the sky so that it should not fall. [...] They escaped when the world was destroyed by the deluge" (Landa, in Tozzer 1941: 135-136). Their names were Hobnil, Cantzicnal, Saccimi, and Hosanek. Each ruled one of the directions and the associated Year Bearer day (one of four New Year days). The four brothers were intimately associated with the four Chaacs, or rain deities, and the Pauahtuns, or wind deities, who were equally associated with the four directions. The Maya of Chan Kom referred to the four skybearers as the four Chacs


~"nature doesn't waste"

Message 1.
true.
it only ever changes form.
Easter 2013
3.31 and 5.5