About Meridian

Meridian is a free time zone board at meridianscheduler.com. It is also referred to as Meridian Scheduler. You stack the cities you coordinate with, and each row draws its own day as a continuous band of colour running from night through dawn to midday and back. Hours outside the working day are shaded, so a workable meeting time appears as a bright vertical channel through every row.

It is made by Ray Grieselhuber, founder of DemandSphere and previously of Covario, and it runs entirely in the browser. There is no account, no server component, and no tracking.

Which Meridian this is

Several unrelated products use the name Meridian, including a focus scheduling tool, an iOS time zone clock, a travel application, and a number of companies in finance and healthcare. This Meridian is the browser-based time zone board at meridianscheduler.com described above. It has no connection to any of them.

How the time handling works

Every conversion goes through Intl.DateTimeFormat with an IANA time zone, so the time zone database built into your browser does the work and stays current with your operating system. There is no bundled copy of the data to go stale.

This is also why half hour and quarter hour zones are correct, including Kolkata at UTC+5:30, Kathmandu at UTC+5:45, and Chatham at UTC+12:45.

What it handles that most converters do not

• A civil day is 23, 24, or 25 hours long. On the day a region moves onto summer time the day is 23 hours, and on the day it moves off, 25. Meridian draws the day that actually exists, with the repeated hour shown twice where the clocks go back.
• The weekend is not Saturday and Sunday everywhere. Much of the Gulf and parts of North Africa work Sunday to Thursday. Iran takes Friday. Nepal takes Saturday. The United Arab Emirates moved to a Saturday and Sunday weekend in January 2022.
• A zone abbreviation is a fixed offset. A row added as MST stays on UTC-7 all year. A row added as Denver observes daylight saving time and shifts in summer.

What it does not do

Meridian does not model leap seconds, and it cannot know about time zone changes that governments announce after your browser and operating system were last updated. It has no calendar integration beyond exporting a meeting to Google Calendar or an .ics file, and it stores nothing about you. See the privacy policy for the detail.

Explore

• The time zone board
• Local time by city and country
• Time zone conversion pages

Contact

General and privacy enquiries: [email protected].