About this tool
Turn an explicitly selected source wall time into one real instant, compare the local result for each participant, and export the same instant for calendar import.
Time Zone Meeting Planner resolves one authored wall time into a real instant, compares that instant across configurable participant IANA zones, and exports the same start and end as a validated UTC calendar event.
- Validates a 1900-9999 Gregorian date, 24-hour wall time, 1 to 1,440 minute duration, source zone, and 1 to 8 unique browser-supported participant IANA zones.
- Rejects skipped DST times, requires an earlier or later choice for repeated times, and shows local start, end, UTC offset changes, and calendar-date differences.
- Exports one UTC VEVENT with bounded title, location, HTTP(S) URL, and description after CRLF, required-property, UTF-8 75-octet folding, and component checks pass.
How to use Time Zone & ICS
Enter the source date, time, duration, and zone; add 1 to 8 exact participant IANA zones; resolve any daylight-saving overlap; review each local start, end, offset, and calendar-date difference; then download meeting.ics.
When this tool is useful
- When the source meeting time is known and each participant needs the corresponding local range.
- When a meeting occurs near a daylight-saving transition.
- When a portable calendar attachment is needed after the time comparison is reviewed.
Practical tips
- Treat the source zone as the owner of the wall-clock input.
- Review the offset label when a long meeting crosses a clock transition.
- Use Meeting Overlap Finder instead when working-hour optimization is still needed.
- Test the downloaded file in the destination calendar before distribution.
Examples you can test
Load an example, compare the result with the expected output, then replace it with your own input.
Export a Seoul-led review
Example input
2026-07-15 09:00 Asia/Seoul; 90 minutes; New York, London, Tokyo
Expected output
One UTC instant with four local start/end ranges and a validated meeting.ics file.
New York appears on the previous calendar date while the other selected zones remain on July 15.
Validation checklist
- Confirm the source wall time and owning IANA zone.
- Choose the intended occurrence when a wall time repeats.
- Review each participant's local date, start, end, and offset.
- Test the ICS import and meeting URL in the destination calendar.