Clockjumper

Timezone conversion

JST to CST Time — Convert Japan Standard Time to Central Standard Time (US)

CST is currently 14 hours behind JST. The gap shifts across the year: around January it is 15 hours behind JST, and around July it is 14 hours behind JST, because one or both zones observe daylight saving.

CST is currently 14 hours behind JST.

JST • GMT+9 (UTC+9)
2:15 AM
Thursday, Jul 9
CST • CDT (UTC-5)
12:15 PM
Wednesday, Jul 8

Abbreviation disambiguation

CST here means Central Standard Time (US). Note: collides: China Standard Time, Cuba Standard Time

Interactive converter

12:00PM

12
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00

Full JST to CST conversion table

JSTCST
12:00 AM10:00 AM(previous day)
1:00 AM11:00 AM(previous day)
2:00 AM12:00 PM(previous day)
3:00 AM1:00 PM(previous day)
4:00 AM2:00 PM(previous day)
5:00 AM3:00 PM(previous day)
6:00 AM4:00 PM(previous day)
7:00 AM5:00 PM(previous day)
8:00 AM6:00 PM(previous day)
9:00 AM7:00 PM(previous day)
10:00 AM8:00 PM(previous day)
11:00 AM9:00 PM(previous day)
12:00 PM10:00 PM(previous day)
1:00 PM11:00 PM(previous day)
2:00 PM12:00 AM
3:00 PM1:00 AM
4:00 PM2:00 AM
5:00 PM3:00 AM
6:00 PM4:00 AM
7:00 PM5:00 AM
8:00 PM6:00 AM
9:00 PM7:00 AM
10:00 PM8:00 AM
11:00 PM9:00 AM

Daylight saving and how the gap changes

Around January the JST → CST offset is 15 hours behind JST. Around July it is 14 hours behind JST. That swing comes from one or both zones observing daylight saving on different schedules — the converter above always reflects the correct offset for the date you pick.

Frequently asked questions

Is CST ahead of or behind JST right now?
CST is currently 14 hours behind JST.
What is the current JST to CST time difference?
Right now the gap is 14 hours behind — CST is 14 hours behind JST.
Does the JST → CST offset change during the year?
Yes. Around January the offset is 15 hours behind JST; around July it is 14 hours behind JST. The converter above always reflects the correct offset for the date you pick.
Does JST observe daylight saving time?
No — Japan Standard Time stays at a fixed UTC offset year-round.
Does CST observe daylight saving time?
Yes — Central Standard Time (US) observes DST, so its UTC offset shifts by 1 hour(s) between winter and summer.
What time is 9 AM JST in CST?
9:00 AM JST is 7:00 PM (previous day) CST.
What time is 12 PM (noon) JST in CST?
12:00 PM JST is 10:00 PM (previous day) CST.
What time is 5 PM JST in CST?
5:00 PM JST is 3:00 AM CST.
When is the best time to schedule a call between JST and CST?
JST and CST have no direct 09:00–17:00 overlap on the same calendar day. Consider early-morning or late-evening slots on one side, or an asynchronous handoff.
What time zone does JST refer to?
JST refers to Japan Standard Time (IANA: Asia/Tokyo).
What time zone does CST refer to?
CST refers to Central Standard Time (US) (IANA: America/Chicago).
Is CST on this page the same as other zones that share the letters "CST"?
On Clockjumper, CST means Central Standard Time (US). Disambiguation: collides: China Standard Time, Cuba Standard Time

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