AST to JST

Atlantic Standard Time

Atlantic Standard Time (AST)

AST is 4 hours behind Universal Time (UTC-4)

↑ ↓

Japan Standard Time

Japan Standard Time (JST)

JST is 9 hours ahead of Universal Time (UTC+9)

AST to JST Time Conversion

When it is 12:00 PM in AST, it is 1:00 AM the next day in JST.

📞There is no overlap during standard 9-to-5 business hours, so a call may need to be early or late in the day for one side.

Time difference between AST and JST

AST is 13 hours behind JST.

🕐 Add 13 hours to AST time to get JST time.

AST uses 4 hours behind Universal Time (UTC-4) and JST uses 9 hours ahead of Universal Time (UTC+9).

AST to JST time conversion chart (24 hours)

Highlighted rows are overlapping 9-to-5 business hours – the best time to schedule a call between AST and JST.

AST Time		JST Time
12 AM AST Time	↔	1 PM JST Time
1 AM AST Time	↔	2 PM JST Time
2 AM AST Time	↔	3 PM JST Time
3 AM AST Time	↔	4 PM JST Time
4 AM AST Time	↔	5 PM JST Time
5 AM AST Time	↔	6 PM JST Time
6 AM AST Time	↔	7 PM JST Time
7 AM AST Time	↔	8 PM JST Time
8 AM AST Time	↔	9 PM JST Time
9 AM AST Time	↔	10 PM JST Time
10 AM AST Time	↔	11 PM JST Time
11 AM AST Time	↔	12 AM JST Time

AST Time		JST Time
12 PM AST Time	↔	1 AM JST Time
1 PM AST Time	↔	2 AM JST Time
2 PM AST Time	↔	3 AM JST Time
3 PM AST Time	↔	4 AM JST Time
4 PM AST Time	↔	5 AM JST Time
5 PM AST Time	↔	6 AM JST Time
6 PM AST Time	↔	7 AM JST Time
7 PM AST Time	↔	8 AM JST Time
8 PM AST Time	↔	9 AM JST Time
9 PM AST Time	↔	10 AM JST Time
10 PM AST Time	↔	11 AM JST Time
11 PM AST Time	↔	12 PM JST Time

AST to JST - Frequently Asked Questions

Q

What is the time difference between AST and JST?

A

AST is 13 hours behind JST.

Q

Is AST ahead of or behind JST?

A

AST is behind JST by 13 hours.

Q

When it is 9:00 AM in AST, what time is it in JST?

A

It is 10:00 PM in JST.

Convert AST Time to Popular Time Zones

Convert Time in Popular Time Zones to JST