I'm sorry but I don't know any other Calendar system Rick. It has been with me since birth. I imagine it has been with a lot of other people too.
Nevertheless I thank you for your educational post.
I was just quoting the dates and quakes for some significant quakes. I think several more significant ones have happened since then anyway. A 6.1 yesterday plus five more over 5.0.
Another thing worth noting in regard to what is significant is all the planes that traverse the globe would probably be using the Gregorian Calendar and possibly UTC but correct me if I'm wrong.
Also, as I understand all air traffic control in international airports use the English language.
Now the Mayan calendar you mention in the list - I think I've heard of that. Something about next year I think - 2012? Is there anything in that? Perhaps 2012 is going to be a special year.
And as for the French, the Brits will never trust them Le Calendeur de La France est supreme, n'est ce pas? C'est la vie!
I read somewhere that the French were being blamed for metrication.
And bon nuit!