For all the people getting ready for 12/21/12, they need to think again

Off topic but can't help it.

For all the people getting ready for 12/21/12, they need to think again. What was 12/21/12 to Maya, was changed a long time after they developed the calendar.

Maya Calendar
A different calendar was used to track longer periods of time, and for the inscription of calendar dates (i.e., identifying when one event occurred in relation to others). This is the Long Count. It is a count of days since a mythological starting-point.[6] According to the correlation between the Long Count and Western calendars accepted by the great majority of Maya researchers (known as the Goodman-Martinez-Thompson, or GMT, correlation), this starting-point is equivalent to August 11, 3114 BCE in the proleptic Gregorian calendar or 6 September in the Julian calendar (−3113 astronomical).

So does anyone really know what time it is?