CST to JST — Time Zone Converter
Central Time (CST, UTC−6) covers the central United States; Japan Standard Time (JST, UTC+9) covers Japan. In standard time, JST is 15 hours ahead of CST. Standard working days in the central United States and Japan 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.
CST to JST, hour by hour (today)
Frequently asked questions
What is the time difference between CST and JST?+
Central Time (CST) is UTC−6 and Japan Standard Time (JST) is UTC+9, so in standard time JST is 15 hours ahead of CST. 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 CST or JST observe daylight saving time?+
Central Time observes daylight saving time (CST in winter, CDT in summer). Japan Standard Time stays on UTC+9 all year — no daylight saving time.
What is the best time for a meeting between CST and JST?+
Standard working days in the central United States and Japan 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 CST to JST 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 CST and JST times spelled out so nobody has to do the math.