EAT ↔ JST Time Converter

Japan Standard Time (JST) is 6h ahead of East Africa Time (EAT). The offset comes from EAT being at UTC+3 and JST at UTC+9. For example, when it is 9:00 AM in Nairobi, it is 3:00 PM in Tokyo.

To convert EAT to JST, add 6 hours to the EAT time. For instance, 12:00 PM EAT becomes 6:00 PM JST. For times that cross midnight, remember to adjust the date accordingly — a "+1 Day" or "-1 Day" note in the converter above flags this automatically. You can also just type directly into the converter fields on this page for instant results.

Japan Standard Time (JST) is 6h ahead of East Africa Time (EAT). Put the other way, EAT is 6h behind of JST. If someone in Tokyo says "let's meet at noon," that translates to 6:00 AM in Nairobi.

East Africa Time (EAT) is the standard clock time used in regions including Nairobi, Addis Ababa, Dar es Salaam, Kampala. It runs at UTC+3 relative to Coordinated Universal Time (UTC). It does not observe Daylight Saving Time, so the offset from UTC remains constant year-round.

Japan Standard Time (JST) is the standard clock time used in regions including Tokyo, Osaka, Kyoto, Yokohama. It runs at UTC+9 relative to Coordinated Universal Time (UTC). It does not observe Daylight Saving Time, so the offset stays fixed all year.

The best window for meetings between EAT and JST is when standard business hours (9 AM – 6 PM) overlap in both zones. Given that JST is 6h ahead of EAT, mornings in the earlier zone tend to align with afternoons in the later zone. Refer to the meeting hours table above to find the exact windows that fall within working hours for both sides. Avoid scheduling calls where one side falls before 7 AM or after 9 PM — those hours are shaded in the table.

Simply type a time into the JST field in the bidirectional converter above — it works equally well in both directions and updates the EAT result instantly. Alternatively, subtract 6 hours from the JST time to get the EAT equivalent. You can also visit the reverse page: JST to EAT converter.

Yes, for some hours they do. Whenever a converted time crosses midnight, the converter above displays a "+1 Day" or "-1 Day" indicator next to the result. The 24-hour table on this page also shows the day change in the Day column. Always check this when scheduling across these two zones to avoid date confusion in calendar invites.

East Africa Time (EAT) is used by cities and regions including: Nairobi, Addis Ababa, Dar es Salaam, Kampala, Mogadishu, Khartoum, Antananarivo. The zone covers UTC+3, with no seasonal change.

Japan Standard Time (JST) is observed in cities and regions including: Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka. It runs at UTC+9, remaining constant throughout the year.

Neither EAT nor JST observes Daylight Saving Time, so the offset between them remains constant at 6h ahead throughout the entire year. This makes scheduling between these two zones straightforward — no need to account for seasonal clock changes.