Question 1

How does the meeting planner find the best slot?

Accepted Answer

For each hour of your chosen date (interpreted in UTC), we compute the wall-clock time in every selected participant's time zone and classify it as work, off, or sleep based on their work hours and weekend definition. We then score each hour by how many participants are in work hours, with a heavy bonus when everyone overlaps. The top 5 suggestions are ranked by score so you can pick the most convenient slot for the whole team.

Question 2

How are time zones and DST handled?

Accepted Answer

We use the browser's built-in Intl.DateTimeFormat with the full IANA timezone database (430+ zones, 400+ cities). When you pick a date and city, we look up the actual UTC offset at that exact instant — including DST transitions, half-hour zones like India (UTC+5:30), and 45-minute zones like Nepal (UTC+5:45). You never need to think about DST; the grid always shows correct local times.

Question 3

Can each participant have different work hours?

Accepted Answer

Yes. By default everyone is assumed to work 9 AM–5 PM Monday to Friday, but you can customize the start hour, end hour, and weekend days for the whole team at once (per-participant overrides are an advanced option in the planner). Weekend days use the ISO-like 0=Sunday, 6=Saturday convention so you can accommodate Middle Eastern Sunday–Thursday weeks or any other pattern.

Question 4

How do I export the chosen meeting time?

Accepted Answer

Once you lock in a candidate slot, three export options appear: a downloadable .ics file (RFC 5545 VEVENT) that imports cleanly into Google Calendar, Outlook, and Apple Calendar; a direct Google Calendar compose link with the date, time, title and description pre-filled; and an Outlook compose link with the same. You can also copy a plain-text summary listing each participant's local time for sharing in chat or email.

Question 5

What extra features does this tool have versus others?

Accepted Answer

(1) Live world clock for 400+ cities with day/night indicator. (2) Color-coded 24-hour grid (green=work, yellow=off, red=sleep) per participant. (3) DST-aware conversion via Intl + IANA database. (4) Per-team work hours + weekend definition. (5) Best-slot finder ranking top 5 overlapping slots. (6) .ics / Google / Outlook export. (7) Plain-text summary copy. (8) Half-hour and 45-minute zone support (IST, NPT, CHAST). (9) Shareable URL encoding participants + date (fragment, never sent to server). (10) localStorage history (max 20, metadata only). (11) Drag-to-reorder cities. (12) Mobile horizontal scroll.

Question 6

Is my data sent anywhere?

Accepted Answer

No. All time zone math runs locally via Intl.DateTimeFormat with the IANA database bundled in your browser. The shareable URL is fragment-encoded so it never reaches a server. History is stored in localStorage on this device only and contains metadata (zone ids + date), never your notes.

Participant	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
New York -04:00 EDT	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
London +01:00 GMT+1	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
New Delhi +05:30 GMT+5:30	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04

Participant	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23
New York -04:00 EDT	20	21	22	23	00	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19
London +01:00 GMT+1	01	02	03	04	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00
New Delhi +05:30 GMT+5:30	05	06	07	08	09	10	11	12	13	14	15	16	17	18	19	20	21	22	23	00	01	02	03	04

World Clock & Meeting Planner

24-hour overlap grid

Top 5 suggested slots

How to use

24-hour overlap grid

Top 5 suggested slots