SAST ↔ JST Time Converter

Japan Standard Time (JST) is 7h ahead of South Africa Standard Time (SAST). SAST runs at UTC+2 and JST at UTC+9. Quick time examples: 8:00 AM SAST = 3:00 PM JST; 12:00 PM SAST = 7:00 PM JST; 5:00 PM SAST = 12:00 AM JST.

To convert SAST to JST, add 7 hours to the SAST time. For example, 12:00 PM SAST becomes 7:00 PM JST. When the result crosses midnight, advance the date by one day (shown as "+1 Day" in the converter). The converter on this page handles all arithmetic and date-rollover automatically.

Japan Standard Time (JST) is 7h ahead of South Africa Standard Time (SAST). Reversed: SAST is 7h behind of JST. Practical example: noon in Tokyo (12:00 PM JST) corresponds to 5:00 AM SAST in Johannesburg, and 5 PM in Tokyo corresponds to 10:00 AM SAST.

South Africa Standard Time (SAST) is the standard civil time for Johannesburg and the surrounding region, operating at UTC+2 from UTC. It does not observe Daylight Saving Time; the UTC offset stays at UTC+2 every day of the year. Major cities: Johannesburg, Cape Town, Durban, Pretoria, Port Elizabeth, Bloemfontein, East London.

Japan Standard Time (JST) covers Tokyo and the surrounding region at UTC+9 from UTC. It does not observe Daylight Saving Time — the offset is fixed at UTC+9 all year with no seasonal change. Cities in this zone: Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka.

No — and this makes SAST–JST one of the simpler pairs to schedule across. Neither zone observes Daylight Saving Time, so the offset is exactly 7h ahead every single day of the year. You can set up a recurring calendar invite once and never adjust it for seasonal clock changes on either side.

The best meeting window is where standard working hours (9 AM – 6 PM) overlap in both zones. Since JST is 7h ahead of SAST, mornings in the earlier zone align with afternoons or evenings in the later zone. Target 8 AM – 11 AM in the earlier-offset zone to keep both sides in reasonable hours. The meeting hours table above shows the exact recommended slots for this pair. Any time where one side falls before 7 AM or after 9 PM is best avoided for regular team calls.

Type any time directly into the JST field in the bidirectional converter above — it instantly shows the SAST result. Alternatively, subtract 7 hours from the JST time manually. For a dedicated reverse page, visit: JST to SAST converter ↗.

Yes — this is a large offset, and many hours will cross midnight. When the converted time passes 11:59 PM, the date advances — the converter shows "+1 Day". When it goes before 12:00 AM, the date moves back — "-1 Day" appears. The 24-hour reference table also shows day changes in the Day column. Always check the date indicator when sending calendar invites across these two zones to avoid accidentally booking on the wrong date.

South Africa Standard Time (SAST) is used in: Johannesburg, Cape Town, Durban, Pretoria, Port Elizabeth, Bloemfontein, East London. The zone operates at UTC+2, with a constant offset all year.

Japan Standard Time (JST) covers: Tokyo, Osaka, Kyoto, Yokohama, Nagoya, Sapporo, Fukuoka. It runs at UTC+9, fixed year-round with no DST change. Use the live clocks at the top of this page to see the current local time in both zones side by side.

Yes — since neither SAST nor JST observes DST, the offset is exactly 7h ahead every day of the year without exception.

When creating a recurring meeting that spans SAST and JST, set the event timezone in your calendar app using the IANA timezone names: Africa/Johannesburg for SAST and Asia/Tokyo for JST. Using IANA names rather than fixed UTC offsets ensures the calendar app automatically adjusts future occurrences for any DST changes, so you never accidentally schedule at the wrong time after a clock transition. For a quick lookup of any specific time, the converter on this page is the fastest way to verify both sides before you send the invite.

No. South Africa abolished Daylight Saving Time in 1994, and SAST has remained at a fixed UTC+2 ever since. This applies to all South African cities — Johannesburg, Cape Town, Durban, and Pretoria all follow the same constant UTC+2 offset all year. South Africa's geographic position (spanning only about 13 degrees of longitude) also makes a single fixed timezone practical across the entire country.

No. Japan abolished Daylight Saving Time in 1951 and has not used it since. Japan Standard Time (JST) is fixed at UTC+9 every day of the year without exception. This makes JST one of the most predictable zones for international scheduling — the JST offset never changes, so a recurring SAST–JST meeting will always occur at the same relative time.