Only workspace IDs are saved in this browser—never files or input.

Meeting date and time

Enter ISO date-time. Values with Z/offset are absolute; values without an offset are interpreted in the selected source time zone.

Paste, type, or drag & drop a text file 19 chars · 1 lines · 19 B

Options

Source time zoneSearch by city or region. This zone interprets the local meeting time and handles daylight-saving rules.

Participant time zonesAdd up to 20 cities. Chosen zones appear as removable chips, so identifiers never need to be typed or comma-separated.

VilniusLondonNew YorkLos AngelesTokyo

DST ambiguityHow to resolve repeated or skipped local wall-clock times.

DurationMeeting duration in minutes.

Workday startsLocal hour considered the start of normal working time.

Workday endsLocal hour considered the end of normal working time.

Runs locally in this browserPreview updates after 80 ms · Nothing is uploaded. Passwords are stored only when you explicitly choose Remember on this device.

Tool outputThe resolved instant, source interpretation, DST status, and local time/working-hours report for every target zone.

Run toolNothing is uploaded. Passwords are stored only when you explicitly choose Remember on this device.

About this utility

How to use Multi-Zone Meeting Planner

Interpret an absolute or local meeting time with explicit DST ambiguity handling and compare working-hour impact across IANA zones.

What to provide

Enter ISO date-time. Values with Z/offset are absolute; values without an offset are interpreted in the selected source time zone.

Paste, type, or drag and drop a supported text file into the input area.
Choose the options that match your intended result.
Select “Run tool” or press Ctrl/Command + Enter, then copy, download, or move the result back into the first input for another pass.

What the result means

The resolved instant, source interpretation, DST status, and local time/working-hours report for every target zone.

Privacy and safety

This utility is loaded as browser code and processes your input only in this tab. OmniCastConverter has no upload endpoint and never stores your content, filenames, tokens, or secrets. Generated markup and code are shown as inert text and are never executed.

Limitations

Time-zone rules come from the pinned Temporal/Intl data available in the browser. Historical political time-zone changes may differ across browser releases.

Try the included example

Select “Load example” at any time to restore this tested sample.

2026-10-26T16:30:00

Multi-Zone Meeting Planner