Find an hour that works for everyone

Each column is one hour of the chosen date on the anchor zone's clock; the anchor sets the headings and which 24 hours the grid covers, and need not be a row. Rows open with your own browser zone, marked you. Search by zone, city or country to add one, the cross removes one, and Reset zones restores the starting list.

Cells are coloured by the local hour in that row: teal prime from 09:00 to 17:59, workable at 08:00 and 18:00 to 19:59, fringe at 07:00 and 20:00 to 21:59, faded overnight for the rest. Each row scores three, two, one or nothing, so the heading gives the best column out of three times the number of rows and prints matching columns in teal. Hover a cell for its exact local time and date.

Take four rows, Los Angeles, New York, London, Kolkata, on Thursday 11 June 2026, a date on which none of those places changes its clocks, with Los Angeles as the anchor. The 09 column is the best one on that grid, and this is how its score adds up.

Three rows sit inside the prime band and score three apiece. Kolkata is the row that costs something: 21:30 is past workable and inside fringe, so it scores one and the column lands at 10 out of 12 in the card heading. Nothing on that day scores higher. Move the meeting an hour later and London falls to 18:00 for two while Kolkata crosses into overnight for nothing, so the column drops to eight. An hour earlier and Los Angeles is at 08:00 and Kolkata at 20:30, which comes to nine. Ten out of twelve is what a spread this wide costs. Someone takes the evening, and the grid at least lets you pick who before the invitation goes out.

Columns are wall-clock hours in the anchor zone, so a daylight-saving change on the meeting date distorts them. With New York as the anchor on 8 March 2026 there is no 02 column, two columns are headed 03, and both hold the same instant. On 1 November 2026 a 25-hour day will not fit in 24 columns, so neighbours can sit two hours apart: the New York row reads 00, 01, 02 while London jumps from 05 to 07. Countries also change clocks on different weekends, so for a few weeks in March and late October the gap between North America and Europe is an hour off its usual value.

Half-hour and 45-minute zones need the same care: a cell reading 18 in Kolkata is 18:30 there, 19 in Kathmandu is 19:45, and the colour follows the hour alone. Rows can also sit on different dates, since a late slot for you is already tomorrow in Asia, and only the hover text carries the day. The bands assume a working day rather than a diary, so treat a high-scoring column as a shortlist.