GMT to JST Converter
Convert time between Greenwich Mean Time (GMT) and Japan Standard Time (JST).
Convert a specific time
- IndiaIST, UTC+5:30
- Eastern Time – New YorkEDT, UTC-4
- Central Time – ChicagoCDT, UTC-5
- Mountain Time – DenverMDT, UTC-6
- Arizona – PhoenixMST, UTC-7
- Pacific Time – Los AngelesPDT, UTC-7
- Mexico CityCST, UTC-6
- Saskatchewan – ReginaCST, UTC-6
- UTC / GMTUTC, UTC+0
- United Kingdom – LondonBST, UTC+1
- Central Europe – Paris, BerlinCEST, UTC+2
- Gulf – DubaiGST, UTC+4
- SingaporeSGT, UTC+8
- Japan – TokyoJST, UTC+9
- Australia Eastern – SydneyAEST, UTC+10
- EST (always UTC-5)Fixed offset, no DST
- CST (always UTC-6)Fixed offset, no DST
- MST (always UTC-7)Fixed offset, no DST
- PST (always UTC-8)Fixed offset, no DST
- IndiaIST, UTC+5:30
- Eastern Time – New YorkEDT, UTC-4
- Central Time – ChicagoCDT, UTC-5
- Mountain Time – DenverMDT, UTC-6
- Arizona – PhoenixMST, UTC-7
- Pacific Time – Los AngelesPDT, UTC-7
- Mexico CityCST, UTC-6
- Saskatchewan – ReginaCST, UTC-6
- UTC / GMTUTC, UTC+0
- United Kingdom – LondonBST, UTC+1
- Central Europe – Paris, BerlinCEST, UTC+2
- Gulf – DubaiGST, UTC+4
- SingaporeSGT, UTC+8
- Japan – TokyoJST, UTC+9
- Australia Eastern – SydneyAEST, UTC+10
- EST (always UTC-5)Fixed offset, no DST
- CST (always UTC-6)Fixed offset, no DST
- MST (always UTC-7)Fixed offset, no DST
- PST (always UTC-8)Fixed offset, no DST
Time Difference
Greenwich Mean Time is 9 hours behind Japan Standard Time right now.
- All year: Greenwich Mean Time is 9 hours behind Japan Standard Time (UTC → JST).
Best time to call
Convenient overlapping hours on Sunday, September 20, 2026.
| GMT (Greenwich Mean Time) | JST (Japan Standard Time) |
|---|---|
| 7:00 AM | 4:00 PM |
| 9:00 AM | 6:00 PM |
| 10:00 AM | 7:00 PM |
| 11:00 AM | 8:00 PM |
No 9 AM–5 PM overlap: suggestions are within working hours on one side and between 7 AM and 10 PM on the other.
Convert another time zone Plan a meeting across GMT and JSTGMT to JST conversion table
For Saturday, September 19, 2026 in Greenwich Mean Time.
| UTC | JST |
|---|---|
| 12:00 AM | 9:00 AM |
| 1:00 AM | 10:00 AM |
| 2:00 AM | 11:00 AM |
| 3:00 AM | 12:00 PM |
| 4:00 AM | 1:00 PM |
| 5:00 AM | 2:00 PM |
| 6:00 AM | 3:00 PM |
| 7:00 AM | 4:00 PM |
| 8:00 AM | 5:00 PM |
| 9:00 AM | 6:00 PM |
| 10:00 AM | 7:00 PM |
| 11:00 AM | 8:00 PM |
| 12:00 PM | 9:00 PM |
| 1:00 PM | 10:00 PM |
| 2:00 PM | 11:00 PM |
| 3:00 PM | 12:00 AM(next day) |
| 4:00 PM | 1:00 AM(next day) |
| 5:00 PM | 2:00 AM(next day) |
| 6:00 PM | 3:00 AM(next day) |
| 7:00 PM | 4:00 AM(next day) |
| 8:00 PM | 5:00 AM(next day) |
| 9:00 PM | 6:00 AM(next day) |
| 10:00 PM | 7:00 AM(next day) |
| 11:00 PM | 8:00 AM(next day) |
About these time zones
Greenwich Mean Time (GMT)
Greenwich Mean Time (GMT) is the time at UTC+0. GMT and UTC show the same clock time; UTC is the scientific standard, while GMT is a time zone name. The United Kingdom and Ireland use GMT only in winter: in summer the UK switches to British Summer Time (BST, UTC+1) and Ireland to Irish Standard Time (IST, UTC+1).
Japan Standard Time (JST)
Japan Standard Time (JST) is UTC+9 all year across the whole of Japan. Japan has not observed daylight saving time since 1951. JST shares its offset with Korea Standard Time.
GMT to JST FAQs
What time is it in JST when it is 9 AM GMT?
On Saturday, September 19, 2026, 9:00 AM UTC is 6:00 PM JST in Japan Standard Time.
How many hours ahead is GMT from JST?
Greenwich Mean Time is 9 hours behind Japan Standard Time (UTC vs JST).
What is the best time for a call between GMT and JST?
On Sunday, September 20, 2026, good options are 7:00 AM UTC (4:00 PM JST), 9:00 AM UTC (6:00 PM JST), 10:00 AM UTC (7:00 PM JST), 11:00 AM UTC (8:00 PM JST). There is no overlap of 9 AM–5 PM working hours, so these fall early or late for one side.
Does GMT change for daylight saving time?
No. GMT stays at UTC+0 all year.
Does JST change for daylight saving time?
No. JST stays at UTC+9 all year.