Time zone history in Indian Ocean islands
3 zones of the tz database have their reference point in Indian Ocean islands. They use 3 different standard times today; the most common is UTC+4, kept by 1 zone. None of them changes clocks during the year under the current rules. 1 used daylight saving time at some point since 1970 and no longer do, most recently in 2009. The record with the most changes of standard time since 1970 is Chagos Archipelago, with once.
Standard times in use
Every zone, with its clock changes since 1970
The strip shows 1970 to 2028; amber marks years with seasonal clock changes.
| Zone | Standard time | Clock changes today | New standard times since 1970 | 1970 to 2028 |
|---|---|---|---|---|
| British Indian Ocean Territory | UTC+6 | no | 1 | |
| Maldives | UTC+5 | no | 0 | |
| Mauritius | UTC+4 | no (last 2009) | 0 |