Istanbul is 8 hours ahead of Houston
Best overlap: 8:00 AM to 10:00 AM in Houston is 4:00 PM to 6:00 PM in Istanbul.
The best time to meet is 8:00 AM to 10:00 AM in Houston, which is 4:00 PM to 6:00 PM in Istanbul. You've got roughly 2 hours — enough for a focused daily check-in if you hold it at 8:00 AM in Houston (4:00 PM in Istanbul). Bear in mind Houston shifts for daylight saving while Istanbul stays fixed — recheck these hours after each clock change.