Atlanta is 5 hours behind Reykjavik
Best overlap: 1:00 PM to 6:00 PM in Reykjavik is 8:00 AM to 1:00 PM in Atlanta.
Book within 1:00 PM to 6:00 PM Reykjavik time (8:00 AM to 1:00 PM in Atlanta) and both teams will be at work. Atlanta is 5 hours behind Reykjavik, so you've got a workable 5-hour overlap — ideal for a standing meeting around 1:00 PM in Reykjavik (8:00 AM in Atlanta). Note that Atlanta follows daylight saving while Reykjavik stays put, so the times above drift by an hour seasonally.