Iran

Iran follows a single time zone (Asia/Tehran) across the entire country, including its capital, Tehran. The UTC+3:30 offset is unique, as most neighboring countries use full-hour offsets (e.g., UTC+3 in Iraq or UTC+4 in the UAE). Businesses scheduling calls or meetings with Iranian counterparts should note this difference to avoid timing errors. Government offices and many businesses operate Sunday to Thursday, with Friday and Saturday as the weekend.

During Ramadan, working hours in Iran may shift earlier to accommodate fasting schedules, though the time zone itself remains unchanged. International travelers or remote collaborators should confirm adjusted business hours in advance. Public holidays, such as Nowruz (Persian New Year), can also affect availability but do not alter the time zone.

When coordinating with Iran from the US, Europe, or Asia, the half-hour offset can create uncommon time differences. For example, Tehran is 8.5 hours ahead of New York (UTC-5), 2.5 hours ahead of Berlin (UTC+1), and 4 hours behind Beijing (UTC+8). Digital calendars and world clock tools often display these offsets correctly, but manual calculations should account for the 30-minute difference.

For virtual meetings, mornings in Iran (9:00 AM IRST) often align with late evenings in East Asia (1:30 PM CST) or early mornings in Europe (6:30 AM CET). Companies with Iranian clients or teams may need to adjust standard meeting windows to accommodate the time gap while respecting local business customs.