The short answer

12pm in Jamestown is 9pm in Japan Standard Time.

Jamestown is 9 hours behind Japan Standard Time. It lands deep outside working hours in Japan Standard Time — see the best time to meet below for a friendlier slot.

Jamestown
12pm
Japan Standard Time
9pm
Right now
11:22pmGMT · UTC+00:00 · Tue, Jun 23
8:22amJST · UTC+09:00 · Wed, Jun 24
Read across to convert
Jamestown
GMT · UTC+00:00
11:22pm ☾
Japan Standard Time
JST · UTC+09:00
8:22am ☀
Pinned12pmJamestown=9pmJapan Standard Time
12amTue
9am
WORK
1am
10am
WORK
2am
11am
WORK
3am
12pm
WORK
4am
1pm
WORK
5am
2pm
WORK
6am
3pm
WORK
7am
4pm
WORK
8am
5pm
9am
WORK
6pm
10am
WORK
7pm
11am
WORK
8pm
PINNED
12pm
WORK
9pm
1pm
WORK
10pm
2pm
WORK
11pm
3pm
WORK
12amWed ·+1d
4pm
WORK
1amWed ·+1d
5pm
2amWed ·+1d
6pm
3amWed ·+1d
7pm
4amWed ·+1d
8pm
5amWed ·+1d
9pm
6amWed ·+1d
10pm
7amWed ·+1d
NOW
11pm
8amWed ·+1d
daylightnightworking hoursoverlap
Best time to meet
Closest workable window
Just outside the working window — early on one side, late on the other.
Jamestown
7am–10am
=
Japan Standard Time
4pm–7pm
Popular conversions

Quick reference.

9amJamestown=6pmJapan Standard Time
12pmJamestown=9pmJapan Standard Time
3pmJamestown=12amJapan Standard Time · next day
5pmJamestown=2amJapan Standard Time · next day
9pmJamestown=6amJapan Standard Time · next day
In context

What each side covers.

Jamestown
GMT · UTC+00:00
11:22pm

Saint Helena, Ascension and Tristan da Cunha

Japan Standard Time
JST · UTC+09:00
8:22am
Cities on this clock

Frequently asked

Quick answers about converting between Jamestown and Japan Standard Time. Can't find what you need? Email [email protected].

What is the time difference between Jamestown and Japan Standard Time?
Jamestown is 9 hours behind Japan Standard Time right now. We always show the live, daylight-saving-correct difference, so this figure already accounts for whichever side is observing summer time today.
When it's 12pm in Jamestown, what time is it in Japan Standard Time?
12pm in Jamestown is 9pm in Japan Standard Time. It lands deep outside working hours in Japan Standard Time — see the best time to meet below for a friendlier slot. Use the hour-by-hour table above to read any other time across.
What's the best time for a call between Jamestown and Japan Standard Time?
There's no comfortable 9-to-5 overlap between Jamestown and Japan Standard Time — they sit on opposite sides of the planet's working day. Plan for an early or late call on one side, or hand work off asynchronously.
Does this account for daylight saving time?
Yes. We track every clock change in both places, so the abbreviations you see — GMT and JST — are the ones actually in effect right now, not a fixed all-year value. When either side changes its clocks, this page updates automatically.
Why is the date sometimes different on each side?
When two places are far enough apart, the same moment can fall on different calendar days. That is why some conversions are marked "previous day" or "next day" — it is the same instant in time, read off two clocks that crossed midnight at different points.