JST to CST Time Converter
Central Standard Time (CST) is currently 15 hours behind Japan Standard Time (JST). JST is UTC+9 and CST is UTC-6. The table below converts every hour of the day between the two, and the call planner shows where working hours line up.
Best Time for a Call
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 5:00 PM in JST, which is 9:00 AM to 5:00 PM in CST.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: JST to CST
Rows marked office hours fall between 9:00 AM and 5:00 PM in both places. For a specific date, use the interactive converter.
Does the Difference Change During the Year?
JST and CST are fixed offsets, so the difference between them never changes.
JST is UTC+9. Japan has no daylight saving, so this offset never changes.
This page covers North American Central Standard Time, UTC-6. The region switches to CDT (UTC-5) in summer. CST can also refer to China Standard Time, which is UTC+8.
Frequently Asked Questions
How many hours behind is CST compared to JST?
CST is currently 15 hours behind JST. JST and CST are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in JST in CST?
9:00 AM in JST is 6:00 PM in CST on the previous day.
What is the best time for a call between JST and CST?
Both sides are inside 9:00 AM to 5:00 PM office hours between 9:00 AM and 5:00 PM in JST, which is 9:00 AM to 5:00 PM in CST.