I checked under Firefox > tools >page info and yes - hubpages does update the hub for the current date. Someitmes it's nice to know the date of when it has been published but because we all can change a hub at anytime - the original date is useless.
Having a date is good when using it as a reference. The date is important according to Chicago Manual of Style - Author-Date System
Think about the olden days of the prophecies of nostradamus - back dating after the fact.