UTC to GST Time Converter
GST is 4 hours ahead of UTC. UTC is the zero point, UTC±00:00, and GST is UTC+4:00.
Best Time to Call Between UTC and GST
Both zones are inside normal business hours between 9:00 AM and 1:00 PM UTC — that's 1:00 PM to 5:00 PM GST. That's a 4-hour window.
both at work UTC only GST only neither — hours along the strip are UTC.
Common Times Converted
UTC on the left, GST on the right.
UTC to GST: Full 24-Hour Conversion Table
Shaded rows are working hours; the darker shade marks the hours when both zones are at work.
| UTC | GST | Working hours |
|---|---|---|
| 12:00 AM | 4:00 AM | — |
| 1:00 AM | 5:00 AM | — |
| 2:00 AM | 6:00 AM | — |
| 3:00 AM | 7:00 AM | — |
| 4:00 AM | 8:00 AM | — |
| 5:00 AM | 9:00 AM | GST only |
| 6:00 AM | 10:00 AM | GST only |
| 7:00 AM | 11:00 AM | GST only |
| 8:00 AM | 12:00 PM | GST only |
| 9:00 AM | 1:00 PM | Both zones |
| 10:00 AM | 2:00 PM | Both zones |
| 11:00 AM | 3:00 PM | Both zones |
| 12:00 PM | 4:00 PM | Both zones |
| 1:00 PM | 5:00 PM | UTC only |
| 2:00 PM | 6:00 PM | UTC only |
| 3:00 PM | 7:00 PM | UTC only |
| 4:00 PM | 8:00 PM | UTC only |
| 5:00 PM | 9:00 PM | — |
| 6:00 PM | 10:00 PM | — |
| 7:00 PM | 11:00 PM | — |
| 8:00 PM | 12:00 AM next day | — |
| 9:00 PM | 1:00 AM next day | — |
| 10:00 PM | 2:00 AM next day | — |
| 11:00 PM | 3:00 AM next day | — |
What UTC and GST Actually Are
UTC — Coordinated Universal Time
The global reference standard. Aviation, computing and science run on it. Standing at UTC as written, and the region does not change its clocks, so that offset holds all year.
UTC is not a place. It is a computed standard, kept within a second of mean solar time at Greenwich by atomic clocks, and it is the reference every other zone is defined against.
GST — Gulf Standard Time
Dubai, Abu Dhabi, Sharjah, Muscat. Standing at UTC+4:00 as written, and the region does not change its clocks, so that offset holds all year. GST also refers to South Georgia Time (UTC-2), which you are very unlikely to want.
The Gulf states have never observed daylight saving, so Dubai's offset has been unchanged for decades — unusual stability for a region that grew as fast as it did.
What This Means in Practice
A gap you can rely on
Neither region changes its clocks, so this difference holds every day of the year. A recurring meeting booked once stays correct — worth knowing, because most cross-border pairs cannot say that.
Major Cities in Each Zone
Cities on GST
Frequently Asked Questions
What is the time difference between UTC and GST?
GST is 4 hours ahead of UTC.
What is 9:00 AM UTC in GST?
9:00 AM UTC is 1:00 PM GST.
What are the best hours to schedule a call between UTC and GST?
Between 9:00 AM and 1:00 PM UTC, which is 1:00 PM to 5:00 PM GST. Both sides are inside normal business hours through that window.
Does the difference between UTC and GST change during the year?
No. Neither region changes its clocks, so this gap is fixed all year round.
Does GST always mean Gulf Standard Time?
GST also refers to South Georgia Time (UTC-2), which you are very unlikely to want.