Kyiv is 0.5 hours behind Tehran

Best overlap: 8:30 AM to 6:30 PM in Tehran is 8:00 AM to 6:00 PM in Kyiv.

Keep meetings inside 8:30 AM to 6:30 PM in Tehran — that maps to 8:00 AM to 6:00 PM in Kyiv. Despite the 0.5-hour difference, a 10-hour overlap keeps things simple and gives both teams breathing room. Keep an eye on the calendar — Kyiv observes daylight saving and Tehran doesn't, which nudges this window by an hour twice a year.