★ TIME CONVERTER · TIME & DATE · TOKYO
Japan Standard Time is UTC+9 year-round: Japan observes NO daylight saving time, ever. At 12:00 JST on October 24, 2026, it is 03:00 UTC the same day but still the previous evening in the US: 23:00 EDT on October 23, 22:00 CDT, 21:00 MDT, and 20:00 PDT. Enter any Tokyo date and time below: the converter subtracts 9 hours to reach UTC, then reads every US zone from that same moment.
The trap with Tokyo is the date, not the offset. Tokyo is 13 hours ahead of Eastern in the daylight period and 14 hours ahead in standard time, so a Tokyo midday is always the previous US evening — and a Tokyo morning can be the previous US afternoon. Enter the Tokyo date, not just the time, and the converter uses the US daylight saving rules in force on that date.
JST is UTC+9 year-round: Japan does not observe daylight saving time, so there is no JST/JDT pair and no spring-forward or fall-back date to remember. UTC = Tokyo time − 9 hours. US times are then read from that UTC moment using the US zone rules in force on the entered date: Eastern is UTC−4 in daylight time and UTC−5 in standard time, Central UTC−5 / UTC−6, Mountain UTC−6 / UTC−7, Pacific UTC−7 / UTC−8. This converter works from the fixed Tokyo offset, never from a Tokyo daylight saving conversion, because there is none.
Setup: 12:00 JST on October 24, 2026, when the US is on daylight time.
Line 1 — UTC. 12:00 − 9 hours = 03:00 UTC on October 24.
Line 2 — Eastern. 03:00 UTC − 4 hours (EDT) = 23:00 EDT on October 23 — the previous evening.
Line 3 — Central. 03:00 UTC − 5 hours (CDT) = 22:00 CDT on October 23.
Line 4 — Mountain. 03:00 UTC − 6 hours (MDT) = 21:00 MDT on October 23.
Line 5 — Pacific. 03:00 UTC − 7 hours (PDT) = 20:00 PDT on October 23.
Winter: 12:00 JST on January 15, 2026. UTC is still 03:00, but the US has fallen back: 22:00 EST Eastern on January 14, 21:00 CST Central, 20:00 MST Mountain, and 19:00 PST Pacific. Every US time is one hour earlier than in October, even though the Tokyo time never moved.
The gap widens in winter. In the daylight period Tokyo sits 13 hours ahead of Eastern, 12 ahead of Central, 11 ahead of Mountain, and 10 ahead of Pacific. In standard time those gaps are 14, 13, 12, and 11 hours. The gap widens by 1 hour in winter because US clocks fall back while Tokyo stays put.
Why the date matters more than the time. Noon Tokyo time is 23:00 Eastern in October and 22:00 Eastern in January. A recurring meeting set by Tokyo time shifts on the US calendar twice a year, at the US daylight saving changes, even though nothing in Tokyo changes at all.
The date-change trap, stated plainly. Tokyo noon is the previous evening in the US, full stop. If you book a "Friday" call from Tokyo without checking, your US counterpart may be joining on Thursday night. Always read the US date the converter prints, not just the US clock time.
| Output | Formula | What it means |
|---|---|---|
| UTC | Tokyo time − 9 hours | 03:00 UTC at the defaults — the same moment on the world clock, every day of the year. |
| Eastern | UTC − 4 hours (EDT) / − 5 hours (EST) | 23:00 EDT on October 23 at the defaults; 22:00 EST on January 14 in winter. |
| Central | UTC − 5 hours (CDT) / − 6 hours (CST) | 22:00 CDT on October 23 at the defaults; 21:00 CST in winter. |
| Mountain | UTC − 6 hours (MDT) / − 7 hours (MST) | 21:00 MDT on October 23 at the defaults; 20:00 MST in winter. |
| Pacific | UTC − 7 hours (PDT) / − 8 hours (PST) | 20:00 PDT on October 23 at the defaults; 19:00 PST in winter. |
The conversion is exact for the entered date and time, because the Tokyo offset never changes. The only subtlety is the US daylight saving transitions themselves: on the two US changeover Sundays, a US clock time near 2:00 a.m. may be ambiguous or skipped, and the converter reads the US zone from the UTC moment, which is the unambiguous way to resolve it. This is a converter, not a live clock: it converts the time you enter and does not track the current time. Error policy: malformed or out-of-range dates and times, and calendar dates that do not exist, are reported as errors rather than converted.
Bright Side Kit. "Tokyo Time Converter: JST to US Time." https://brightoolbox.com/tokyo-time-converter/ Accessed October 24, 2026.No. Japan stays on JST, UTC+9, all year. There is no Japan daylight time, no spring-forward, and no fall-back. That fixed offset is why the converter subtracts exactly 9 hours to reach UTC on every date.
01:00 JST the next day in the daylight period, 02:00 JST the next day in standard time. Tokyo is 13 hours ahead of Eastern in summer and 14 hours ahead in winter, because only the US moves.
Because the US falls back and Tokyo does not. 12:00 JST is 23:00 EDT in October but 22:00 EST in January. The gap widens by 1 hour in winter on every US zone.
Seoul shares JST's UTC+9 offset, but Beijing does not. Seoul is also UTC+9 year-round, while Beijing is UTC+8. Noon in Tokyo is noon in Seoul but 11:00 in Beijing.
UTC+9, always. Subtract 9 hours from any Tokyo time to get UTC: 12:00 JST is 03:00 UTC on every day of the year, summer and winter alike.
No, it converts the time you enter. Enter the Tokyo date and time you care about — a meeting, a flight, a call — and it shows every zone at that same moment.
Yes, routinely. Tokyo is far ahead of the US, so Tokyo daytime is US evening of the previous day. Always check the US date for Tokyo daytime calls, not just the clock.
Because US daylight saving rules depend on the date. Without the date the converter could not know whether the US is on daylight or standard time, and the answer would be off by an hour for half the year.