Tehran is 4.5 hours behind Shenzhen
Best overlap: 12:30 PM to 6:30 PM in Shenzhen is 8:00 AM to 2:00 PM in Tehran.
Schedule calls for 12:30 PM to 6:30 PM in Shenzhen — your colleagues in Tehran will be online from 8:00 AM to 2:00 PM. Tehran is 4.5 hours behind Shenzhen, but the generous 6-hour window means both teams can meet well within their normal day.