JST to CDT Time Converter
Central Daylight Time (CDT) is currently 14 hours behind Japan Standard Time (JST). JST is UTC+9 and CDT is UTC-5. 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
There is no overlap between 9:00 AM and 5:00 PM office hours in these two zones. Stretching to early mornings and evenings, the workable window runs from 9:00 PM to 9:00 PM in JST, which is 7:00 AM to 7:00 AM in CDT. One side ends up outside normal hours, so alternating who takes the awkward slot is a fair way to handle recurring calls.
Comparing more than two places? The Overlap Zones tool shows working hours for several cities on one grid.
Hour by Hour: JST to CDT
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 CDT are fixed offsets, so the difference between them never changes.
JST is UTC+9. Japan has no daylight saving, so this offset never changes.
CDT is UTC-5, the summer counterpart of CST. Central North America uses it from March to November.
Frequently Asked Questions
How many hours behind is CDT compared to JST?
CDT is currently 14 hours behind JST. JST and CDT are fixed offsets, so the difference between them never changes.
What time is 9:00 AM in JST in CDT?
9:00 AM in JST is 7:00 PM in CDT on the previous day.
What is the best time for a call between JST and CDT?
There is no overlap between 9:00 AM and 5:00 PM office hours in these two zones. Stretching to early mornings and evenings, the workable window runs from 9:00 PM to 9:00 PM in JST, which is 7:00 AM to 7:00 AM in CDT. One side ends up outside normal hours, so alternating who takes the awkward slot is a fair way to handle recurring calls.