Vancouver is 8 hours behind Hamburg
Best overlap: 4:00 PM to 6:00 PM in Hamburg is 8:00 AM to 10:00 AM in Vancouver.
For a call that suits both sides, look at 4:00 PM to 6:00 PM in Hamburg / 8:00 AM to 10:00 AM in Vancouver. With overlap this short — around 2 hours — a recurring slot at 4:00 PM in Hamburg (8:00 AM in Vancouver) is worth its weight in gold.