GMT to JST Time Converter

GMT refers to the Europe/London timezone, currently ++1 (GMT+1). JST refers to Asia/Tokyo, currently ++9 (GMT+9). Timezone abbreviation meanings and offsets are calculated live from the IANA tz database, so Daylight Saving Time is always applied correctly.

Representative cities: London (United Kingdom) for GMT and Tokyo (Japan) for JST.

Key Facts

• GMT (Europe/London): current live offset ++1.
• JST (Asia/Tokyo): current live offset ++9.
• Time difference is computed from live IANA tzdb offsets and may shift by one hour during DST transitions.