Time Zone Meeting Planner
Pick a base time and zone, then see the matching time across US and world zones to schedule a meeting everyone can join.
This planner runs entirely in your browser. Nothing is uploaded or stored.
How to use this tool
Use this time zone meeting planner to line up one moment in time across several regions at once. First choose the meeting date. Next set the meeting time using your normal local clock. Then pick the base time zone that the date and time belong to, for example Pacific if you are in Los Angeles. Press Compare time zones and the tool shows the same instant translated into each major US zone plus a handful of world zones, so you can compare EST, CST, MST, PST and beyond in a single glance. Rows that land in a comfortable working window are highlighted, which makes it easy to spot the best meeting window before you send the invite. The Use current time button fills in this exact moment, and Copy results puts the full list on your clipboard to paste into an email or chat.
How it works
The planner treats your input as a wall-clock time in the base zone. It builds the matching absolute instant, then asks the browser to render that single instant in every other zone using the built-in Intl.DateTimeFormat with a timeZone option. Because the browser ships an up to date time zone database, daylight saving shifts are handled automatically, so an Eastern time in July correctly maps to EDT rather than EST. A working time zone coordinator like this never changes the actual moment, only how each region labels it, which is why a 2:00 PM Pacific call always equals 5:00 PM Eastern on the same day.
A real example
Say you set the date to a weekday, the time to 9:00 AM, and the base zone to Pacific (Los Angeles). The planner will report 12:00 PM in Eastern (New York), 11:00 AM in Central (Chicago), 10:00 AM in Mountain (Denver), and 9:00 AM in Pacific. Looking wider, that same instant is 5:00 PM in London and the next morning at 1:30 AM in India. In this case the four mainland US rows fall inside normal business hours and get highlighted as a good window, while India clearly does not, so you would push the call earlier in the US day to include that region.
Common questions
How do I compare EST, CST, MST and PST quickly?
Enter any one base time and zone, then press Compare. The tool lists Eastern, Central, Mountain and Pacific side by side along with world zones, so you see all four US zones for the same moment at once.
Does it handle daylight saving time?
Yes. It uses the browser's own time zone database through Intl.DateTimeFormat, so summer and winter offsets are applied automatically based on the chosen date. You do not need to add or subtract an hour by hand.
What counts as the best meeting window?
Any zone whose local time falls roughly between 8:00 AM and 6:00 PM is marked as a good window. It is a simple working-hours guide to help you spot times that suit most participants, not a strict rule.
Is my schedule data sent anywhere?
No. Everything is calculated locally in your browser. Nothing you type is uploaded, saved on a server, or shared.
Why is the date different in some zones?
When a time crosses midnight in a faraway region, the calendar date rolls over. The planner shows the full local date and time for each zone so a meeting that lands on the next morning in Tokyo is clearly labeled.