G'day,
such would be quite challenging, simply because summer/winter time isn´t the same all over the world.
The only way to achieve a proper setting would need to incorporate a regional edition, which is capable of re-adjusting the time setting based on a (perpetual) calendar.
While there is a WW.TC Perpetual Calendar, there´s no functionality to re-set time right now.
I´d guess such would be technically possible to achieve, but most certainly will not be exactly cheap...
Thus your best bet is to get in touch with your GP dealer and see what can be done!
Cheers,
Peter