Stand straight up when the alarm clock goes into the new winter season. Especially don't stay in bed. Do not give in to fatigue. Nice walk outdoors. Healthy too!
Why wait until the day of winter itself? Beginning several days before doing anything with an hour earlier. So an hour before eating and on the bench. Do not sleep another hour earlier, but should also build on this. So get used to the difference the body.
To quickly get used to winter time you start every day at the same time to go to bed and you get up at the same time. This will take you quickly into the right rhythm.