GST to AST/ADT time converter

AST/ADT is 7 hours behind GST. When it is 9:00 AM in GST, it is 2:00 AM in AST/ADT.

GST UTC+4

Friday, October 16, 2026

AST/ADT ADT

Friday, October 16, 2026

GST
Gulf Standard Time
Fri, Oct 16
UTC+4
AST/ADT
Atlantic Standard Time
Fri, Oct 16
ADTUTC-3-7h
Finding your time zone…
Shared working hours (9:00–18:00)

GST to AST/ADT conversion table

Every hour of today in GST and the matching time in AST/ADT. Light rows are typical working hours (9:00–18:00).

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

Best time to call or meet

Both sides are at work from 4:00 PM – 6:00 PM in GST (9:00 AM – 11:00 AM in AST/ADT).

Daylight saving time and the difference

The difference changes during the year because GST and AST/ADT switch clocks on different dates:

  • Oct 16, 2026 – Nov 1, 2026: -7h
  • Nov 1, 2026 – Mar 14, 2027: -8h
  • Mar 14, 2027 – Oct 16, 2027: -7h

More conversions

AST to GSTGST to UTCGST to GMTGST to ESTGST to CSTGST to MSTGST to PSTGST to CETGST to MSKGST to PKTGST to ISTGST to SGTGST to PHT
UTC to ASTGMT to ASTEST to ASTCST to ASTMST to ASTPST to ASTCET to ASTMSK to ASTPKT to ASTIST to ASTSGT to ASTPHT to AST

Questions and answers

What is the time difference between GST and AST/ADT?

AST/ADT is 7 hours behind GST.

What time is it in AST/ADT when it is 9 AM in GST?

When it is 9:00 AM in GST, it is 2:00 AM in AST/ADT.

When is the best time to call AST/ADT from GST?

Both sides are at work from 4:00 PM – 6:00 PM in GST (9:00 AM – 11:00 AM in AST/ADT).

Does the time difference between GST and AST/ADT change?

Yes, for part of the year, because daylight saving time starts and ends on different dates or applies on one side only.