IRDT time now |
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10:12:05 Fri, 4 Jul 2025
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| UTC Offset: UTC +4:30 |
Iran Daylight Time (IRDT) operates at UTC+4:30 and is traditionally used in Iran during the summer months as a daylight saving adjustment. By advancing clocks one hour ahead of Iran Standard Time (IRST, UTC+3:30), IRDT helps maximize daylight hours in the evenings, benefiting daily routines and energy savings. Sometimes referred to as "Iran Summer Time," IRDT historically runs from March to September each year.
Importance and Global Use of IRDT
Iran Daylight Time (IRDT) has traditionally been important for optimizing energy use and supporting commercial and social activities during long summer days. Extending daylight into the evening helped businesses, schools, and public services operate more efficiently while reducing pressure on electricity demand.
Globally, IRDT also supported smoother coordination with international partners in regions observing daylight saving time. By shifting to UTC+4:30 during summer, Iran was able to align more closely with time zones in neighboring countries, facilitating trade, telecommunications, and travel across the Middle East and beyond.
Where and When IRDT is used worldwide
Other Time Zones in UTC +4:30
Other time zones share the same offset as Iran Daylight Time (IRDT), but are known by different names. While their clocks align, they may represent different regions or countries based on local time zone definitions.