CHST to JST Time Converter
Use this CHST to JST time converter to compare Chamorro Standard Time and Japan time instantly. JST is 1 hour behind CHST, so 9:00 AM CHST becomes 8:00 AM JST and 5:00 PM CHST becomes 4:00 PM JST. The page is useful for business-hours overlap, international calls, remote-team handoffs, webinars, and travel planning, with daylight saving adjustments handled automatically.
ChST to JST Quick Facts
Use this CHST to JST converter to compare Chamorro Standard Time and Japan time, check the 1 hour gap, and confirm the right slot for calls, handoffs, and deadlines. Good overlap starts around 10:00 AM CHST / 9:00 AM JST.
How to Convert ChST to JST
Converting between Chamorro Standard Time and Japan Standard Time means accounting for a 1 hour gap — here's how to do it in under 10 seconds with no sign-up.
Pick the date and time in Chamorro Standard Time (UTC +10) that you want to convert. Hit "Now" to load the current ChST time instantly, or use "+1h" to step forward and compare.
The equivalent Japan Standard Time (UTC +9) time appears immediately. Since JST is 1 hour behind of ChST, most daytime conversions stay on the same calendar day.
Click "Copy Time" to grab the JST result for your calendar or message. Use "+1d" to check how the conversion shifts across dates — useful when Daylight Saving Time changes the gap.
Why Choose Our ChST to JST Converter
When someone in ChST suggests 10:00 AM ChST, that's 9:00 AM JST. This converter shows the overlap so both sides agree on one slot — no back-and-forth.
Late-night ChST times can land on a different date in JST because of the 1 hour offset. The converter labels "next day" or "previous day" next to the result so you never send a message a day early or miss a deadline.
Daylight Saving adjustments can widen or narrow the ChST–JST gap by an hour. During transition weeks many people get it wrong. This converter pulls the current UTC offsets automatically, so the result is right even on the changeover day.
Product launches, sports matches, and webinars are often announced in ChST. Convert the event time to JST so you know exactly when to tune in — with a 1 hour difference, a morning event in ChST falls during work hours in Japan.
ChST to JST Time Conversion Chart
Quick-reference conversion table covering every hour of the day at a glance.
Chamorro Standard Time to Japan Standard Time full day schedule
| Chamorro Standard Time | Japan Standard Time |
|---|---|
| 12:00 AM |
11:00 PM
(previous day)
|
| 1:00 AM |
12:00 AM
|
| 2:00 AM |
1:00 AM
|
| 3:00 AM |
2:00 AM
|
| 4:00 AM |
3:00 AM
|
| 5:00 AM |
4:00 AM
|
| 6:00 AM |
5:00 AM
|
| 7:00 AM |
6:00 AM
|
| 8:00 AM |
7:00 AM
|
| 9:00 AM |
8:00 AM
|
| 10:00 AM |
9:00 AM
|
| 11:00 AM |
10:00 AM
|
| 12:00 PM |
11:00 AM
|
| 1:00 PM |
12:00 PM
|
| 2:00 PM |
1:00 PM
|
| 3:00 PM |
2:00 PM
|
| 4:00 PM |
3:00 PM
|
| 5:00 PM |
4:00 PM
|
| 6:00 PM |
5:00 PM
|
| 7:00 PM |
6:00 PM
|
| 8:00 PM |
7:00 PM
|
| 9:00 PM |
8:00 PM
|
| 10:00 PM |
9:00 PM
|
| 11:00 PM |
10:00 PM
|
Timezone offsets and DST rules verified against the IANA Time Zone Database. Conversion math and business-hour overlap windows double-checked against real-world scheduling scenarios.
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