Current Time in Indian/Chagos Time Zone

Overview and Coverage

The Indian/Chagos zone applies exclusively to the British Indian Ocean Territory, an overseas territory of the United Kingdom located in the central Indian Ocean. The territory comprises the Chagos Archipelago, with Diego Garcia being the largest island and home to a joint US-UK military facility. No permanent civilian population resides in the territory, but military and support personnel use this time zone. The zone is one of several IANA time zones at UTC+06:00, alongside Asia/Bishkek (Kyrgyzstan), Asia/Dhaka (Bangladesh), Asia/Omsk (Russia), Asia/Thimphu (Bhutan), and Asia/Urumqi (China).

Offset and Abbreviation

The standard offset is UTC+06:00, commonly abbreviated as IOT (Indian Ocean Time) or simply +06. Because the territory does not observe daylight saving time, the offset remains constant throughout the year. This means that when UTC is 00:00, local time in Chagos is 06:00. The abbreviation IOT is not officially standardized but is widely understood in timekeeping contexts.

Daylight Saving Time (DST) Behavior

Indian/Chagos does not observe daylight saving time. The British Indian Ocean Territory lies near the equator (latitude roughly 6°S to 7°S), so daylight hours vary little throughout the year. There is no practical benefit to shifting clocks, and the territory has never adopted DST. As a result, the offset remains UTC+06:00 every day of the year, simplifying scheduling for residents and visitors.

Countries and Key Locations

The only territory using Indian/Chagos is the British Indian Ocean Territory. The primary settlement is the military base on Diego Garcia (coordinates 7.3°S, 72.4°E). Other islands include Peros Banhos, Salomon Islands, and the Great Chagos Bank, but these are uninhabited. The nearest populated time zones are Maldives (UTC+05:00) to the west and Indonesia (UTC+07:00) to the east.

Business Hours and Scheduling Guidance

For coordination with other regions, Indian/Chagos is 6 hours ahead of Coordinated Universal Time (UTC). Typical business hours (09:00–17:00 IOT) overlap with: London (UTC+00:00) from 09:00 to 17:00 IOT = 03:00–11:00 GMT (early morning); New York (UTC-05:00) from 09:00 to 17:00 IOT = 22:00–06:00 EST (overnight); Tokyo (UTC+09:00) from 09:00 to 17:00 IOT = 12:00–20:00 JST (afternoon to evening). The best overlap for calls with US East Coast is 12:00–17:00 IOT (07:00–12:00 EST). For Europe, mornings in IOT align with late morning/early afternoon in Central Europe (UTC+01:00). Since IOT does not change clocks, these relationships are stable year-round, unlike zones that observe DST.

Practical Notes

When traveling to Diego Garcia, set your watch to UTC+06:00 upon arrival. Internet services and military communications typically use this zone. If you are scheduling a conference call with personnel on the base, confirm the time in IOT to avoid confusion with other UTC+06:00 zones that might observe DST (none do, but some like Asia/Omsk have different historical practices). The zone is sometimes referred to as "Diego Garcia Time" informally.