what changed value method gettime() in LocationListener when change time mobile?

public Location getLocation() {

    LocationManager locationManager = (LocationManager) mContext
                .getSystemService(Context.LOCATION_SERVICE);

        Criteria criteria = new Criteria();
        criteria.setAccuracy(Criteria.ACCURACY_FINE);
       String provider = locationManager.getBestProvider(criteria, false);

                    locationManager.requestLocationUpdates(
                            provider,
                            0,
                            0, this);

                        Location  location = locationManager
                                .getLastKnownLocation(provider);

       return location;

}