Tehran to New York Time

Tehran (Iran) is an important regional economy, with key industries in diverse sectors including services and trade. New York (United States) is a global financial and tech hub, known for technology, finance, healthcare, and entertainment. With a 8.5-hour time difference, professionals frequently schedule cross-border calls between these two cities for international trade, remote team collaboration, and client meetings.

Scheduling Meetings Between Tehran and New York

With New York 8.5 hours behind Tehran, there is minimal overlap in standard business hours. Most teams alternate meeting times to share the burden of early-morning or late-evening calls fairly. Business hours typically follow a 9 AM–5 PM schedule. US business hours typically run 9 AM–5 PM, with a culture that values punctuality and efficiency. Consider recording meetings for those who can't attend live, and use shared documents for async collaboration.

Daylight Saving Time Considerations

Both Tehran and New York observe Daylight Saving Time. Tehran uses IRST/IRDT (switching between standard and daylight time), while New York uses EST/EDT. If their DST transitions happen on different dates — which is common, as the US, EU, and other regions change clocks on different weekends — the effective time difference between the two cities can shift by 1 hour for several weeks. Always double-check the actual offset during March–April and October–November.

IRST (IRST/IRDT) stands for the timezone used in Tehran, Iran (UTC+3:30). EST (EST/EDT) is the timezone used in New York, United States (UTC-5). Tehran is 8 hours and 30 minutes ahead of New York.

To convert IRST to EST, subtract 8.5 hours from IRST time. For example, IRST 9:00 AM = EST 12:30 AM.