No overlap — one side will join outside working hours
ART (Buenos Aires)
JST (Tokyo)
00:00
12:00Working
01:00
13:00Working
02:00
14:00Working
03:00
15:00Working
04:00
16:00Working
05:00
17:00
06:00
18:00
07:00
19:00
08:00
20:00
09:00Working
21:00off
10:00Working
22:00off
11:00Working
23:00off
12:00Working
00:00+1doff
13:00Working
01:00+1doff
14:00Working
02:00+1doff
15:00Working
03:00+1doff
16:00Working
04:00+1doff
17:00
05:00+1d
18:00
06:00+1d
19:00
07:00+1d
20:00
08:00+1d
21:00
09:00+1dWorking
22:00
10:00+1dWorking
23:00
11:00+1dWorking
Working hours: 09:00–17:00 local. Green = both working.Purple = one side only.
Frequently Asked Questions
What is the difference between art and jst?
Argentina Time (art) is UTC-3 and Japan Standard Time (jst) is UTC+9. The difference between them is 12 hours.
Where is art used?
Argentina Time (art) is used in Argentina and surrounding regions. The IANA timezone identifier is America/Argentina/Buenos_Aires.
Where is jst used?
Japan Standard Time (jst) is used in Japan and surrounding regions. The IANA timezone identifier is Asia/Tokyo.
How do I convert art to jst?
Use the interactive converter above. Drag the time slider to any art time and the jst equivalent updates instantly. You can also type a time like "3pm" or "15:00" in the input bar.
How far apart are ART (Buenos Aires) and JST (Tokyo)?
ART (Buenos Aires) is 12 hours behind JST (Tokyo). Midday in ART (Buenos Aires) lines up with 00:00 in JST (Tokyo).
ART (Buenos Aires) observes America/Argentina/Buenos_Aires and JST (Tokyo) observes Asia/Tokyo — a 12 hours gap between them.
Daily overlap window
When ART (Buenos Aires) is in standard working hours, JST (Tokyo) is not — and vice versa. There is no mutual business window between these two locations.
Optimal meeting slots
No business hours overlap exists between ART (Buenos Aires) and JST (Tokyo). Showing the most balanced options with minimal inconvenience for both locations.
04:00 Buenos Aires / 16:00 Tokyo⚡ One side off-hours
⚠️ 5h before working hours in Buenos Aires
09:00 Buenos Aires / 21:00 Tokyo⚡ One side off-hours
⚠️ 5h after working hours in Tokyo
16:00 Buenos Aires / 04:00 Tokyo⚡ One side off-hours
⚠️ 5h before working hours in Tokyo
Assumes a standard 9 AM–5 PM workday in each location's local timezone.
Upcoming public holidays
⚡ Watch out — upcoming holidays on both sides. Verify availability in advance.
ART (Buenos Aires)8 holidays
Jun 15Anniversary of the Passing of General Martín Miguel de GüemesSOON
Jun 20General Manuel Belgrano Memorial DaySOON
Jul 9Independence Day
Aug 17General José de San Martín Memorial Day
Oct 12Day of Respect for Cultural Diversity
JST (Tokyo)7 holidays
Jul 20Marine Day
Aug 11Mountain Day
Sep 21Respect for the Aged Day
Sep 23Autumnal Equinox Day
Oct 12Sports Day
How to work with ART (Buenos Aires) and JST (Tokyo) time zones
Coordinating between ART (Buenos Aires) (Argentina) and JST (Tokyo) (Japan) means working around a 12-hour time difference. Since standard business hours don't naturally overlap, meetings usually require one side to shift slightly outside their normal working day.
💡 How to schedule across these time zones
⚡
04:00–05:00 in ART (Buenos Aires) corresponds to 16:00–17:00 in JST (Tokyo) (5h before working hours in Buenos Aires).
⚡
09:00–10:00 in ART (Buenos Aires) corresponds to 21:00–22:00 in JST (Tokyo) (5h after working hours in Tokyo).
⚡
16:00–17:00 in ART (Buenos Aires) corresponds to 04:00–05:00 in JST (Tokyo) (5h before working hours in Tokyo).
Since there is no natural overlap, the options above represent the most balanced compromise, minimizing out-of-hours inconvenience for both sides.
Recurring meetings are particularly vulnerable to DST shifts. The ClockinSync Chrome Extension alerts you before the offset changes.
Drag the slider at the top to convert any ART (Buenos Aires) time instantly. You can also type natural language like "3pm", "15:00", or a location name to get an immediate answer.
