I believe the Windows OS in general makes the Fall DST change at 3.00am on the last Sunday of October, and the Spring change at 2.00am on the last Sunday of March. Could someone enlighten me on the exact times that the Android OS, in general, (or 4.3 specifically) makes the DST changes?
As far as I know, every OS makes the change at the officially scheduled time for your timezone. This is different in different timezones, but if you've previously observed your Windows clock changing at a particular time, you'll see any other OS changing at the same time. The exact time is set by the government: programmers don't just pick a time they think would be nice.