GST to United States time conversion

GST time

GSTUTC+4Not observed

Time in United States

EDTUTC-4Daylight saving time

United States is 8 hours behind GST. After the next clock change (): United States is 9 hours behind GST.

Time difference with your location

GST is 4 hours ahead of UTC. Compare with your local time →

Choose a date and time

Choose the local time in GST to convert it to United States on that date.

United States to GST time conversion

Skipped clock-change times are unavailable; a repeated time uses its first occurrence.

24-hour conversion chart · GST → United States

This table converts each hour in GST to United States on 2026-10-21.

  • Working hours
  • Outside working hours
  • Night hours
GSTUnited StatesShared working hours
00:0012:00 AM 16:004:00 PM -1 day
01:001:00 AM 17:005:00 PM -1 day
02:002:00 AM 18:006:00 PM -1 day
03:003:00 AM 19:007:00 PM -1 day
04:004:00 AM 20:008:00 PM -1 day
05:005:00 AM 21:009:00 PM -1 day
06:006:00 AM 22:0010:00 PM -1 day
07:007:00 AM 23:0011:00 PM -1 day
08:008:00 AM 00:0012:00 AM
09:009:00 AM 01:001:00 AM
10:0010:00 AM 02:002:00 AM
11:0011:00 AM 03:003:00 AM
12:0012:00 PM 04:004:00 AM
13:001:00 PM 05:005:00 AM
14:002:00 PM 06:006:00 AM
15:003:00 PM 07:007:00 AM
16:004:00 PM 08:008:00 AM ✓
17:005:00 PM 09:009:00 AM ✓
18:006:00 PM 10:0010:00 AM
19:007:00 PM 11:0011:00 AM
20:008:00 PM 12:0012:00 PM
21:009:00 PM 13:001:00 PM
22:0010:00 PM 14:002:00 PM
23:0011:00 PM 15:003:00 PM

Quick conversion examples

These examples use GST (UTC+4) and United States (UTC-4); choosing a date applies the local clock changes.

Conversion formula: United States = GST − 8h · GST − 9h.

GSTUnited States
6:00 AM GST= 10:00 PM United States (-1 day)
7:00 AM GST= 11:00 PM United States (-1 day)
8:00 AM GST= 12:00 AM United States
9:00 AM GST= 1:00 AM United States
10:00 AM GST= 2:00 AM United States
12:00 PM GST= 4:00 AM United States
3:00 PM GST= 7:00 AM United States
5:00 PM GST= 9:00 AM United States
6:00 PM GST= 10:00 AM United States
8:00 PM GST= 12:00 PM United States

Overlapping meeting hours

The 08:00–18:00 working day in GST and United States overlaps for 2 hours on 2026-10-21.

Shared working hours
16:00–18:00 GST · 08:00–10:00 United States

Clock changes on both sides, 2026–2028

GST and United States have the following local clock changes in 2026–2028; all times in the table are local to that side.

YearGSTUnited States
2026 No clock changes; UTC+4 all year.

· 02:00 → 03:00
UTC-5 → UTC-4

· 02:00 → 01:00
UTC-4 → UTC-5

2027 No clock changes; UTC+4 all year.

· 02:00 → 03:00
UTC-5 → UTC-4

· 02:00 → 01:00
UTC-4 → UTC-5

2028 No clock changes; UTC+4 all year.

· 02:00 → 03:00
UTC-5 → UTC-4

· 02:00 → 01:00
UTC-4 → UTC-5

At the start of 2026, United States is 9 hours behind GST. The difference changes during the following periods.

  • From 2026-03-08 11:00 GST until 2026-11-01 10:00 GST, United States is 8 hours behind GST.
  • From 2027-03-14 11:00 GST until 2027-11-07 10:00 GST, United States is 8 hours behind GST.
  • From 2028-03-12 11:00 GST until 2028-11-05 10:00 GST, United States is 8 hours behind GST.

Frequently asked questions

What time is 9 AM GST in United States?

9:00 AM GST = 1:00 AM United States, using UTC+4 and UTC-4. Choose a date above for the seasonal local time.

Does the time difference between GST and United States change during the year?

Yes. During 2026–2028: United States is 9 hours behind GST; United States is 8 hours behind GST. The clock-change table gives the dates for both sides.

How do I tell whether it is day or night in United States?

Read the United States clock above: this guide counts 06:00–18:00 local time as daytime and the rest as nighttime, without using sunrise and sunset.

What is the best time to call between GST and United States?

The shared 08:00–18:00 working window is 16:00–18:00 GST / 08:00–10:00 United States, a total of 2 hours.

What is the time difference between GST and United States now?

Right now, United States is 8 hours behind GST. Conversion formula: United States = GST − 8h · GST − 9h.