CalendarDateSelect plugin Localize

Hi everyone, I am developing in spanish, am using the CalendarDateSelect plugin using the localize script, as is in the plugin web page, but when When I translate it I can't save the date to DB because "Enero" it's not "January" and Rails can't understand it. There is a solution in the same webpage, but I can't change this format.rb file, So where I must define the new parse format to be possible save the date in teh DB.

Thanks

PD: Sorry about my english

gianpero