Supplement: This post wasn’t well understood and also after the 2012 fizzer, people don’t have trust in what the Mayan Calendars say. I hope the following will put more light on this post and make it more credible.
The mortal is of the masculine because everything is influenced by cycles, cycles of course mean an eventual end (mortality).
Immortal existences works differently in that we are more about our immortal self rather than our mortal self. We become aware of our immortal self because the cycles within this feminine age are more passive.
I think misreading what the calendars actually said, comes from desire rather than awareness, a desire of an immediate more constructive existence.