Time zone converter
JST to AST
Convert Japan Time — Tokyo to Arabia Time — Riyadh — fast, accurate, and daylight-saving aware.
When it's 9:00 AM in Tokyo, it's 3:00 AM in Riyadh. Riyadh is 6 hours behind Tokyo. Use the converter above to turn any JST time into AST, or scan the hour-by-hour table below for the full day.
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Japan Time — Tokyo ·
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Arabia Time — Riyadh ·
Convert a specific timein Tokyo → — in Riyadh
JST to AST at a glance
9:00 AM JST
3:00 AM
AST · Riyadh
12:00 PM JST
6:00 AM
AST · Riyadh
5:00 PM JST
11:00 AM
AST · Riyadh
Planning a meeting between Tokyo and Riyadh
Planning a call between Tokyo and Riyadh? The best overlap during a standard 9-to-5 workday runs 3:00 PM–5:00 PM JST (9:00 AM–11:00 AM AST). Aim for that window to reach both sides during business hours.
Hour-by-hour: Tokyo to Riyadh
A full day mapped from JST to AST.
Frequently asked
Is Riyadh ahead of or behind Tokyo?
Riyadh is 6 hours behind Tokyo.
What is 12:00 PM JST in AST?
12:00 PM in Tokyo is 6:00 AM in Riyadh.
Does this converter account for daylight saving time?
Yes. Conversions use the IANA time zone database, so JST and AST automatically reflect the correct daylight-saving offset for the current date.