AST to IST Time — Convert Atlantic Standard Time to India Standard Time

IST is currently 8 hours and 30 minutes ahead of AST.

On Clockjumper, AST refers to Atlantic Standard Time in Atlantic Canada and the Caribbean (UTC−4). The same letters are also used for Arabia Standard Time (UTC+3) — check the city or UTC offset to be sure which is meant.

On Clockjumper, IST refers to India Standard Time (UTC+5:30). The same three letters are also used for Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1) — check the city or UTC offset to be sure which is meant.

Around January IST is 9 hours and 30 minutes ahead of AST. Around July it is 8 hours and 30 minutes ahead of AST. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.

Is IST ahead of or behind AST right now?

IST is currently 8 hours and 30 minutes ahead of AST.

What is the current AST to IST time difference?

Right now the gap is 8 hours and 30 minutes — IST is 8 hours and 30 minutes ahead of AST.

Does the AST → IST offset change during the year?

Yes. Around January IST is 9 hours and 30 minutes ahead of AST; around July it is 8 hours and 30 minutes ahead of AST. The converter above always reflects the correct offset for the date you pick.

Does AST observe daylight saving time?

AST is itself the standard-time form. Atlantic Standard Time is in force at UTC-4 through the winter months; outside that window the same zone is on ADT (UTC-3).

Does IST observe daylight saving time?

No — India Standard Time stays at a fixed UTC offset year-round.

What time is 3 AM AST in IST?

3:00 AM AST is 11:30 AM IST.

What time is 8 AM AST in IST?

8:00 AM AST is 4:30 PM IST.

What time is 9 AM AST in IST?

9:00 AM AST is 5:30 PM IST.

What time is 10 AM AST in IST?

10:00 AM AST is 6:30 PM IST.

What time is 11 AM AST in IST?

11:00 AM AST is 7:30 PM IST.

What time is 12 PM (noon) AST in IST?

12:00 PM AST is 8:30 PM IST.

What time is 2 PM AST in IST?

2:00 PM AST is 10:30 PM IST.

What time is 3 PM AST in IST?

3:00 PM AST is 11:30 PM IST.

What time is 4 PM AST in IST?

4:00 PM AST is 12:30 AM (next day) IST.

What time is 5 PM AST in IST?

5:00 PM AST is 1:30 AM (next day) IST.

What time is 9 PM AST in IST?

9:00 PM AST is 5:30 AM (next day) IST.

What time is 10 PM AST in IST?

10:00 PM AST is 6:30 AM (next day) IST.

When is the best time to schedule a call between AST and IST?

AST and IST have no direct 09:00–17:00 overlap on the same calendar day. Consider early-morning or late-evening slots on one side, or an asynchronous handoff.

What time zone does AST refer to?

AST refers to Atlantic Standard Time (IANA: America/Halifax).

What time zone does IST refer to?

IST refers to India Standard Time (IANA: Asia/Kolkata).

Is AST on this page the same as other zones that share the letters "AST"?

On Clockjumper, AST refers to Atlantic Standard Time in Atlantic Canada and the Caribbean (UTC−4). The same letters are also used for Arabia Standard Time (UTC+3) — check the city or UTC offset to be sure which is meant.

Is IST on this page the same as other zones that share the letters "IST"?

On Clockjumper, IST refers to India Standard Time (UTC+5:30). The same three letters are also used for Israel Standard Time (UTC+2) and Irish Standard Time (UTC+1) — check the city or UTC offset to be sure which is meant.

• IST to AST
• AST to CST
• AEDT to IST
• AST to EST
• AEST to IST
• AST to GMT
• Berlin to IST
• AST to MST
• BST to IST
• AST to PST
• CDT to IST
• CST to AST
• CEST to IST
• EST to AST
• CET to IST

• About AST (Atlantic Standard Time) →
• About IST (India Standard Time) →
• All timezone conversion pages →
• Research: how daylight saving shifts workday overlap →