Countdown to Multiple Time Zones
Enter a local date/time with its IANA zone, then list zones to compare formatted local times and a shared countdown.
A QUICK WALKTHROUGH
How to use this tool
- Enter the event date/time and clearly choose its IANA source time zone.
- List one IANA time zone per line.
- Review local times and the countdown to the same instant.
One instant, several displays
The source date/time is interpreted in the IANA zone you select. Each listed zone receives a formatted view of that same instant. Nonexistent local times during a clock change are rejected. If a local time occurs twice, the earlier instant is used.
Local estimate
The countdown uses the browser clock and can be affected by clock changes or throttling. It does not send reminders.
GOOD TO KNOW
Common questions
Does it use a custom timezone database?
No. It uses the browser Intl time-zone implementation.
Does it send an alert?
No. It displays a countdown only.
What does the source zone mean?
It identifies the timezone for interpreting your entered local date and time.