Does Tokyo observe Daylight Saving Time?

No. Japan uses JST (Japan Standard Time, UTC+9) year-round. The Japanese government abolished seasonal time changes in 1951, so Tokyo's UTC offset never shifts.

Does Riyadh observe Daylight Saving Time?

No. Saudi Arabia uses AST (Arabia Standard Time, UTC+3) year-round without any Daylight Saving adjustment. The UTC+3 offset is constant.

What are the best meeting times for Tokyo and Riyadh?

Riyadh business hours (09:00–18:00 AST) correspond to 15:00–00:00 JST in Tokyo. A 09:00–12:00 Riyadh window lands at 15:00–18:00 Tokyo — an ideal end-of-day slot for Japan. Avoid scheduling past 18:00 Riyadh (00:00 Tokyo) for same-day overlap.

Is this tool accurate for scheduling?

Yes. It uses the IANA timezone database embedded in your browser — the same source used by operating systems and calendar apps worldwide. Accuracy depends on your device clock being synchronized via NTP, which most devices do automatically.

What does AST stand for in Saudi Arabia?

AST stands for Arabia Standard Time (UTC+3). It is used in Saudi Arabia, Qatar, Bahrain, Kuwait, Yemen, and Eritrea. Note that AST also refers to Atlantic Standard Time (UTC-4) in the Americas — a different timezone with the same abbreviation.

Time Difference: Tokyo to Riyadh

Tokyo (JST, UTC+9) is always 6 hours ahead of Riyadh (AST, UTC+3) — neither city observes Daylight Saving Time, so the offset is fixed year-round.

Tokyo, Japan

--:--:--

JST UTC+9

Riyadh, Saudi Arabia

--:--:--

AST UTC+3

Current Offset

+6 hours

Tokyo is 6 hours ahead of Riyadh — fixed year-round (no DST in either city)

Meeting Overlap Finder

Business hours (09:00–18:00) highlighted — best overlap shaded

Riyadh (AST)	Tokyo (JST)	Status

Convert Riyadh Time to Tokyo Time

Fixed +6 hour offset — Tokyo is always 6 hours ahead

Riyadh (AST)	Tokyo (JST)

Summary

This tool displays the live current time in both Tokyo (Asia/Tokyo — JST, UTC+9) and Riyadh (Asia/Riyadh — AST, UTC+3) side by side. Neither Japan nor Saudi Arabia observes Daylight Saving Time, which means the 6-hour gap between them is fixed year-round and never changes. Use this tool to schedule calls between Tokyo and Riyadh, coordinate Japan-Saudi business meetings, or quickly convert any Tokyo time to the corresponding Riyadh time.

How it works

Your browser reads the current moment from your device clock.
It converts that moment to Asia/Tokyo time (JST, UTC+9) using the IANA timezone database built into modern browsers.
The same moment is converted to Asia/Riyadh time (AST, UTC+3).
The UTC offsets of both cities are compared to calculate the exact 6-hour difference.
All three values — Tokyo time, Riyadh time, and the offset — refresh every second.
Because neither city uses DST, the +6 hour offset is constant and never adjusts.

Use cases

Scheduling video calls between Tokyo and Riyadh offices.
Checking if a colleague in Riyadh is still at their desk.
Planning Japan-Saudi Arabia travel and arrival time comparisons.
Remote teams coordinating daily standups across Japan and Saudi Arabia.
Finding overlapping business hours for Tokyo-Riyadh meetings.
Converting Tokyo meeting invites to local Riyadh time.
Journalists checking broadcast times for live Tokyo or Riyadh events.
Students and teachers arranging online lessons between Japan and Saudi Arabia.

Frequently Asked Questions

Last updated: 2026-06-11 · Reviewed by Nham Vu