Timezone abbreviation
JST Timezone
Japan Standard Time is commonly shown as JST and has an offset of UTC+09:00. JST is used throughout Japan and does not observe daylight saving time.
When to use it
JST in real schedules
Use JST for Japan-based schedules, product launches, calls, and travel planning.
Daylight saving
Japan does not currently observe daylight saving time.
Avoid abbreviation mistakes
Timezone abbreviations are compact, but they are not always unique and they do not always describe daylight saving behavior. For exact meetings, choose a city and date in the converter. That lets the timezone database apply the correct local rules instead of relying on a fixed abbreviation.