Convert SGT (Singapore Time) to JST (Japan Standard Time)

Best time to schedule a meeting

Standard 9–5 working hours overlap for 7 hours: 9:00 AM–4:00 PM SGT (10:00 AM–5:00 PM JST). Schedule meetings inside that window.

SGT to JST conversion table

About SGT

Singapore Time (SGT) is UTC+8. It is used in Singapore and Malaysia.

Singapore Time is UTC+8 with no daylight saving. The offset is a historical curiosity: Singapore sits at about 104°E, which is geographically UTC+7, and moved to +8 in 1982 to align with Malaysia and Hong Kong for trade. The result is that the sun is at its highest around 1pm rather than noon, and sunrise is late all year.

About JST

Japan Standard Time (JST) is UTC+9. It is used in all of Japan, with no daylight saving.

Japan Standard Time is UTC+9 for the whole country and has had no daylight saving since 1951, when the occupation-era experiment was abandoned. Proposals to reintroduce it, most recently before the 2020 Olympics, have failed each time. The offset is shared with South Korea, so Tokyo and Seoul never differ by even a minute.

Does this gap change with the seasons?

Neither SGT nor JST shifts with the seasons, so this 1-hour difference holds all year. That is unusual enough to be worth relying on: most cross-continental gaps move twice a year.

This is the reason scheduling systems store an IANA zone such as Region/City rather than an offset or an abbreviation: the zone knows its own rules and the offset does not.

Frequently asked questions