Classic deepity. Nature doesn't speak in terms of our chronological labels, but it does follow regular cycles that we name and predict. Earth does complete a rotation once a day and a revolution once a year. Old Faithful does erupt about every 90 minutes. It is not unreasonable to predict some natural disaster according to our own time scales, because those time scales are based on nature's.
(The 2012 hysteria is indeed a load of crap, but be careful not to overstate things.)