[Motorola Droid 3] niko99:
hello

you find this in Framework-res.apk (when you decompile it by apktool )

in res/values/strings.xml

and you must looking for below (this copy from my strings.xml, and is translate to polish)

for example you must edit only this part mark on red ;)

<string name="month_long_standalone_january">Styczeń</string>

<string name="month_long_standalone_february">Luty</string>

<string name="month_long_standalone_march">Marzec</string>

<string name="month_long_standalone_april">Kwiecień</string>

<string name="month_long_standalone_may">Maj</string>

<string name="month_long_standalone_june">Czerwiec</string>

<string name="month_long_standalone_july">Lipiec</string>

<string name="month_long_standalone_august">Sierpień</string>

<string name="month_long_standalone_september">Wrzesień</string>

<string name="month_long_standalone_october">Październik</string>

<string name="month_long_standalone_november">Listopad</string>

<string name="month_long_standalone_december">Grudzień</string>

<string name="month_long_january">Styczeń</string>

<string name="month_long_february">Luty</string>

<string name="month_long_march">Marzec</string>

<string name="month_long_april">Kwiecień</string>

<string name="month_long_may">Maj</string>

<string name="month_long_june">Czerwiec</string>

<string name="month_long_july">Lipiec</string>

<string name="month_long_august">Sierpień</string>

<string name="month_long_september">Wrzesień</string>

<string name="month_long_october">Październik</string>

<string name="month_long_november">Listopad</string>

<string name="month_long_december">Grudzień</string>

<string name="month_medium_january">Sty</string>

<string name="month_medium_february">Lut</string>

<string name="month_medium_march">Mar</string>

<string name="month_medium_april">Kwi</string>

<string name="month_medium_may">Maj</string>

<string name="month_medium_june">Cze</string>

<string name="month_medium_july">Lip</string>

<string name="month_medium_august">Sie</string>

<string name="month_medium_september">Wrz</string>

<string name="month_medium_october">Paź</string>

<string name="month_medium_november">Lis</string>

<string name="month_medium_december">Gru</string>

<string name="month_shortest_january">J</string>

<string name="month_shortest_february">F</string>

<string name="month_shortest_march">M</string>

<string name="month_shortest_april">A</string>

<string name="month_shortest_may">M</string>

<string name="month_shortest_june">J</string>

<string name="month_shortest_july">J</string>

<string name="month_shortest_august">A</string>

<string name="month_shortest_september">S</string>

<string name="month_shortest_october">O</string>

<string name="month_shortest_november">N</string>

<string name="month_shortest_december">D</string>

<string name="day_of_week_long_sunday">Niedziela</string>

<string name="day_of_week_long_monday">Poniedziałek</string>

<string name="day_of_week_long_tuesday">Wtorek</string>

<string name="day_of_week_long_wednesday">Środa</string>

<string name="day_of_week_long_thursday">Czwartek</string>

<string name="day_of_week_long_friday">Piątek</string>

<string name="day_of_week_long_saturday">Sobota</string>

<string name="day_of_week_medium_sunday">Nie</string>

<string name="day_of_week_medium_monday">Pon</string>

<string name="day_of_week_medium_tuesday">Wto</string>

<string name="day_of_week_medium_wednesday">Śro</string>

<string name="day_of_week_medium_thursday">Czw</string>

<string name="day_of_week_medium_friday">Pią</string>

<string name="day_of_week_medium_saturday">Sob</string>

<string name="day_of_week_short_sunday">Su</string>

<string name="day_of_week_short_monday">Mo</string>

<string name="day_of_week_short_tuesday">Tu</string>

<string name="day_of_week_short_wednesday">We</string>

<string name="day_of_week_short_thursday">Th</string>

<string name="day_of_week_short_friday">Fr</string>

<string name="day_of_week_short_saturday">Sa</string>

<string name="day_of_week_shortest_sunday">S</string>

<string name="day_of_week_shortest_monday">M</string>

<string name="day_of_week_shortest_tuesday">T</string>

<string name="day_of_week_shortest_wednesday">W</string>

<string name="day_of_week_shortest_thursday">T</string>

<string name="day_of_week_shortest_friday">F</string>

<string name="day_of_week_shortest_saturday">S</string>

;)