There are no opening credits at all, except the Columbia Pictures logo and the movie title "2012".
During the Columbia Pictures logo, the fire of the torch held aloft by the "torch lady" slowly turns into the sun while the whole screen dissolves into a scene of outer space.
The opening scene of the movie shows the years and events leading up to 2012 (2009...2010...2011). The title card not only states the movie's title, but also seems to indicate, "And in the year 2012..."