Time Zone Meeting Planner
Pick a date, list the cities, read the grid: green is nine-to-five, yellow is early morning or evening, grey is asleep. Everything stays on your device. ← Workbench
How to read it
Each column is one hour of the day in the top city — the row you can move up with its ↑ button to change the reference. Every other row shows what that same instant is on that city's clock, colored by how reasonable it is to expect someone awake and working. The outlined columns are the best shared window of the day, and the thin white line is the current hour.
Half-hour zones (India, and friends) show a ½ after the hour: a column that reads 14½ in Delhi is 14:30 local. Binning stays by hour, so 9:30 in Delhi counts as a working hour, which is how most of India's workday actually lines up with Europe.
Daylight-saving days are shown honestly: on a date when clocks jump (most zones switch at night), the top city's column labels skip an hour — you'll see 01, then 03 — and every row shifts with it. The blue left edge marks where a row's local date rolls over to the next day.
The grid is built from your browser's own time zone database, so historical and future switch dates follow the official rules of each region. The reset button brings back the starter cities, and the copy link button produces a plain URL that re-opens exactly this date and set of cities — no account, no server, nothing stored anywhere but your own browser.