Reykjavik is 1 hour behind Hamburg
Best overlap: 9:00 AM to 6:00 PM in Hamburg is 8:00 AM to 5:00 PM in Reykjavik.
The sweet spot is 9:00 AM to 6:00 PM Hamburg time, matching 8:00 AM to 5:00 PM in Reykjavik. Even with Reykjavik behind by 1 hour, your workdays overlap by a comfortable 9 hours — plenty of flexibility for both sides. Heads up: because Hamburg changes its clocks and Reykjavik doesn't, the difference moves by an hour twice a year. Confirm the overlap around the DST switch.