Houston is 6 hours behind Reykjavik
Best overlap: 2:00 PM to 6:00 PM in Reykjavik is 8:00 AM to 12:00 PM in Houston.
The hours that work for both Reykjavik and Houston are 2:00 PM to 6:00 PM (Reykjavik) and 8:00 AM to 12:00 PM (Houston). Roughly 4 hours of shared hours means scheduling takes a little care — 2:00 PM in Reykjavik / 8:00 AM in Houston is a safe default. Bear in mind Houston shifts for daylight saving while Reykjavik stays fixed — recheck these hours after each clock change.