GST to AST Converter

AST is 8h 0m behind GST. When it's 12:00 PM GST, it's 4:00 AM AST.

From

GST · UTC+4

8:09:51AM

Gulf Standard Time

e.g. Dubai

To

AST · UTC-4

12:09:51AM

Atlantic Standard Time

e.g. Halifax, Puerto Rico

Open in World ClockAST → GST
9:00 AM GST=1:00 AM AST
12:00 PM GST=4:00 AM AST
5:00 PM GST=9:00 AM AST

Hourly conversion (GST → AST)

GSTAST
12:00 AM4:00 PM(−1 day)
1:00 AM5:00 PM(−1 day)
2:00 AM6:00 PM(−1 day)
3:00 AM7:00 PM(−1 day)
4:00 AM8:00 PM(−1 day)
5:00 AM9:00 PM(−1 day)
6:00 AM10:00 PM(−1 day)
7:00 AM11:00 PM(−1 day)
8:00 AM12:00 AM
9:00 AM1:00 AM
10:00 AM2:00 AM
11:00 AM3:00 AM
12:00 PM4:00 AM
1:00 PM5:00 AM
2:00 PM6:00 AM
3:00 PM7:00 AM
4:00 PM8:00 AM
5:00 PM9:00 AM
6:00 PM10:00 AM
7:00 PM11:00 AM
8:00 PM12:00 PM
9:00 PM1:00 PM
10:00 PM2:00 PM
11:00 PM3:00 PM

Shaded rows are within standard working hours (8am–6pm) on both sides.

More GST conversions

Frequently asked questions

What is the time difference between GST and AST?
AST is 8h 0m behind GST. GST is UTC+4 and AST is UTC-4.
What is 12:00 PM GST in AST?
12:00 PM GST is 4:00 AM AST.
Does GST change for daylight saving time?
GST is a fixed offset of UTC+4 and does not itself change for daylight saving time.