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Date & time

Meeting Time Zone Planner

Compare one proposed meeting instant across several time zones and identify date changes.

Date conventions explained belowClear start and end values
Date workspace
Date workspace

Check which endpoints and calendar conventions are included.

See the method

Choose your dates and times

Runs on your device

Your time calculation

Your result

Let’s calculate.

Use the Calculate button to see your result.

Review the method below for assumptions and conventions.

How to use this tool

  1. Enter proposed meeting timestamp with utc offset, iana time zones — one per line.
  2. Select Calculate to view the result.
  3. Check the method and assumptions below before using the result.

The method, explained

Format the same UTC instant independently in each requested zone; dates and daylight-saving offsets are evaluated for that instant.

A WORKED EXAMPLE

Using proposed meeting timestamp with utc offset = 2026-09-21T14:00:00Z, iana time zones — one per line = America/New_York Europe/London Asia/Tokyo, the result is America/New_York Monday, 21 September 2026 at 10:00:00 GMT-4 Europe/London Monday, 21 September 2026 at 15:00:00 BST Asia/Tokyo Monday, 21 September 2026 at 23:00:00 GMT+9. Change these example inputs to match your task; use the method above to check each step.

Understanding your result

No. It displays your proposed time in each location so you can decide whether the local dates and hours are suitable.

What to keep in mind

Compares a proposed meeting time only; it does not access calendars, infer working hours or send invitations.

Common questions

Does this choose a meeting time automatically?

No. It displays your proposed time in each location so you can decide whether the local dates and hours are suitable.

Does it include daylight saving?

Yes, using the rules bundled with your browser for the proposed date. Future rule changes require an updated browser.

Methodology maintained by ClarityKit. How these tools are built and checked.