About Meridian

What Meridian does

Add the cities you care about and they line up on one hour strip. Drag the strip and every clock moves together, so instead of converting one time zone at a time you read all of them at once. It answers the question you actually have, which is rarely "what time is it in Berlin" and usually "if I call at four, who is asleep".

The strip is shaded by the real sunrise and sunset in each place, computed from the city's latitude and the date you are looking at. Night is not a fixed nine to five band: in December, Stockholm's dark hours stretch most of the working day, and the shading shows that instead of pretending every city keeps the same waking hours.

Finding a time everyone is awake for

Give each person their own working hours and Meridian marks the slots where all of them are inside those hours. When no slot fits, it shows the closest ones and who has to stretch, which is the honest answer to a meeting spanning more than about eight hours of longitude. Half-hour and 45-minute offsets are handled properly, so India, Nepal and Newfoundland land where they belong rather than rounded to the nearest hour.

Daylight saving, without the arithmetic

Every time is resolved against the IANA time zone database for the date you are viewing, not against a fixed offset. Pick a date after a clock change and the gap between two cities changes with it. That is where manual conversion usually breaks: the United States, Europe and Australia switch on different weekends, so for a few weeks each year the difference between New York and London is not the five hours everyone remembers.

Questions

Do I need an account?

No. There is no sign-up and no email field anywhere in it.

Where are my cities stored?

In your own browser's local storage. Meridian has no server to send them to, so your list stays on the device you added it on and is not synced or collected.

Is it free?

The web version is free to use, with no ads. The iOS app is a free download, with a one-off purchase for Meridian Pro.

Is there an iPhone app?

Yes. Meridian World Clocks is on the App Store. It adds the things this page does not have: people with their own working hours, the slot finder, and unlimited cities.

Who makes it?

Pulipe, a small product studio. Meridian is one of its apps.