Where and When is D Observed?

Delta Time Zone is often used in aviation and the military as another name for UTC +4. Delta Time Zone is also commonly used at sea between longitudes 52.5° East and 67.5° East.

The letter D may be used as a suffix to denote a time being in the Delta Time Zone, such as 08:00D or 0800D. This is spoken as "zero eight hundred Delta".

Only showing up to 16 cities, others may also be observing Delta Time Zone.

This time zone is in use, but not observed in any location at this time.

Other Time Zones in UTC +4

Some time zones exist that have the same offset as D, but can be found under a different name:

• ADT – Arabia Daylight Time
• AMT – Armenia Time
• AZT – Azerbaijan Time
• GET – Georgia Standard Time
• GST – Gulf Standard Time
• KUYT – Kuybyshev Time
• MSD – Moscow Daylight Time
• MUT – Mauritius Time
• RET – Reunion Time
• SAMT – Samara Time
• SCT – Seychelles Time