Take it to a watch repair place, no problem for them to do.
I would not recommend trying it yourself as way to much can go wrong if you dont know what your doing and have no equipment etc etc. also remember these are macro pics, some of the parts are pretty small.
Even if you were to remove the hands and dial without any damage you still have to remove the date wheel then the keyless works cover etc.
With the dial off it will look something like this
You would need to get under 6 on the date wheel.
I dont think you need to part it out just take it somewhere local, good luck