D to IRST Converter
Quick answers
D is 30 minutes ahead of IRST. D uses GMT +4, and IRST uses GMT +3:30 for this comparison.
For example, 4:00 pm D is 3:30 pm IRST. Use the converter above to adjust the date or time and create a shareable meeting link.
Best meeting overlap: 9:30am-5pm D, which is 9am-4:30pm IRST.
Compare D time with IRST time, including current local time, UTC offsets, time difference, daylight saving changes, working hours, and shareable meeting times.
Time Difference
Delta Time Zone is 0 hours and 30 minutes ahead of Iran Standard Time
4:00 pm16:00 in D is 3:30 pm15:30 in IRST
D to IRST call time
Best time for a conference call or a meeting is between 9:30am-5pm in D which corresponds to 9am-4:30pm in IRST
4:00 pm16:00 Delta Time Zone (D). Offset UTC +4:00 hours
3:30 pm15:30 Iran Standard Time (IRST). Offset UTC +3:30 hours
4:00 pm16:00 D / 3:30 pm15:30 IRST
| D | IRST |
|---|---|
| 12am (midnight) | 11:30 pm |
| 1am | 12:30 am |
| 2am | 1:30 am |
| 3am | 2:30 am |
| 4am | 3:30 am |
| 5am | 4:30 am |
| 6am | 5:30 am |
| 7am | 6:30 am |
| 8am | 7:30 am |
| 9am | 8:30 am |
| 10am | 9:30 am |
| 11am | 10:30 am |
| 12pm (noon) | 11:30 am |
| 1pm | 12:30 pm |
| 2pm | 1:30 pm |
| 3pm | 2:30 pm |
| 4pm | 3:30 pm |
| 5pm | 4:30 pm |
| 6pm | 5:30 pm |
| 7pm | 6:30 pm |
| 8pm | 7:30 pm |
| 9pm | 8:30 pm |
| 10pm | 9:30 pm |
| 11pm | 10:30 pm |
| 00:00 | 23:30 |
| 01:00 | 00:30 |
| 02:00 | 01:30 |
| 03:00 | 02:30 |
| 04:00 | 03:30 |
| 05:00 | 04:30 |
| 06:00 | 05:30 |
| 07:00 | 06:30 |
| 08:00 | 07:30 |
| 09:00 | 08:30 |
| 10:00 | 09:30 |
| 11:00 | 10:30 |
| 12:00 | 11:30 |
| 13:00 | 12:30 |
| 14:00 | 13:30 |
| 15:00 | 14:30 |
| 16:00 | 15:30 |
| 17:00 | 16:30 |
| 18:00 | 17:30 |
| 19:00 | 18:30 |
| 20:00 | 19:30 |
| 21:00 | 20:30 |
| 22:00 | 21:30 |
| 23:00 | 22:30 |
Delta Time Zone
Offset: D is 4 hours ahead Greenwich Mean Time (GMT) and is used in Military
Daylight Saving: Clocks in Delta Time Zone (D) do not change for daylight saving time, so D stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
D representations, usage and related time zones
- +04 - basic short
- +0400 - basic
- +04:00 - extended
- +0400 - sign character (+) followed by a four digit time providing hours (04) and minutes (00) of the offset. Indicates an offset of four hours to the east of the zero meridian.
- Delta - Military abbreviation for D
- D - short form of 'Delta'
- KUYT - Kuybyshev Time
- MSD - Moscow Daylight Time
- SAMT - Samara Time
- AMT - Armenia Time
- AZT - Azerbaijan Time
- D - Delta Time Zone
- GET - Georgia Standard Time
- GST - Gulf Standard Time
- MUT - Mauritius Time
- RET - Reunion Time
- SCT - Seychelles Time
Iran Standard Time
Offset: IRST is 3 hours and 30 minutes ahead Greenwich Mean Time (GMT) and is used in Asia
Countries using this time zone: Iran
Principal Cities: The largest city in the IRST time zone is Tehran in Iran, with about 7.153 million people. Other major cities in this time zone include Mashhad, Isfahan, Karaj, Tabriz.
Daylight Saving: Clocks in Iran Standard Time (IRST) do not change for daylight saving time, so IRST stays the same throughout the year. Other time zones may set clocks forward in summer and back in winter.
IRST representations, usage and related time zones
- +0330 - basic
- +03:30 - extended
- +0330 - sign character (+) followed by a four digit time providing hours (03) and minutes (30) of the offset. Indicates an offset of three hours and thirty minutes to the east of the zero meridian.