JST to CST — Time Zone Converter
Japan Standard Time (JST, UTC+9) covers Japan; Central Time (CST, UTC−6) covers the central United States. In standard time, CST is 15 hours behind JST. Standard working days in Japan and the central United States barely overlap, so most teams alternate who takes the early-morning or late-evening slot. Use the live converter below — it applies today's IANA time zone data, including daylight saving time, and gives you a meeting schedule you can paste straight into email or Slack.
JST to CST, hour by hour (today)
Frequently asked questions
What is the time difference between JST and CST?+
Japan Standard Time (JST) is UTC+9 and Central Time (CST) is UTC−6, so in standard time CST is 15 hours behind JST. The gap shifts by an hour around daylight saving transitions, so always check a live converter near the change dates in spring and autumn.
Does JST or CST observe daylight saving time?+
Japan Standard Time stays on UTC+9 all year — no daylight saving time. Central Time observes daylight saving time (CST in winter, CDT in summer).
What is the best time for a meeting between JST and CST?+
Standard working days in Japan and the central United States barely overlap, so most teams alternate who takes the early-morning or late-evening slot. The converter above highlights office hours in green for both zones, so you can slide to a time that works for everyone.
How do I share a JST to CST meeting time by email?+
Pick a time in the converter, log it to the Smart Clipboard, and copy it as bullets, a formatted table, or a one-line question — with both JST and CST times spelled out so nobody has to do the math.