Caracas is 5 hours behind Hamburg
Best overlap: 1:00 PM to 6:00 PM in Hamburg is 8:00 AM to 1:00 PM in Caracas.
The sweet spot is 1:00 PM to 6:00 PM Hamburg time, matching 8:00 AM to 1:00 PM in Caracas. You've got a decent 5-hour window. Set a recurring time near 1:00 PM in Hamburg (8:00 AM in Caracas) and stick to it. Just remember Hamburg changes its clocks for daylight saving and Caracas doesn't, so confirm the overlap whenever the seasons turn.