About the site

About MARKETSHOURS

MARKETSHOURS answers one question: which stock markets are open right now, and when does the next one ring its bell. Everything on the site exists to answer that without asking you to work out a timezone conversion in your head.

Who publishes this

The site is owned and operated by Multimods, Via Monte Grappa, 01030 Vitorchiano (Viterbo), Italy. It is a small independent project, not a broker, not a data vendor and not affiliated with any of the exchanges listed. Questions, corrections and complaints go to dev@multimods.net; there is more on the contact page.

Where the data comes from

Nothing here is scraped from another site. Two sources do the work.

• The exchanges themselves. Opening and closing times, session structure and holiday closures are taken from the published calendars of each exchange — NYSE and Nasdaq, the London Stock Exchange, Euronext, Deutsche Börse, the Japan Exchange Group and the rest. When an exchange changes its hours, the change is made here by hand.
• The IANA time zone database. Every conversion between an exchange's local time and yours runs through it. That is what allows the site to know that Tokyo never changes its clocks while New York does, and to get the transition dates right without anyone maintaining a list.

The globe uses NASA Visible Earth imagery and country outlines from Natural Earth, both public domain. Live prices, charts and the economic calendar are supplied by TradingView and clearly marked as such.

How the hours are calculated

Each market is stored as its local session — 09:30 to 16:00 in New York, 09:00 to 11:30 and 12:30 to 15:30 in Tokyo — never as a fixed UTC offset. The conversion to your time happens in your browser, using your device's own time zone.

This matters more than it sounds. A site that hardcodes "NYSE opens at 14:30 UTC" is wrong for several weeks a year, because the United States and Europe change their clocks on different weekends and Asia mostly does not change them at all. Storing the local time and converting on the fly is the only way to stay right in March and October.

Lunch breaks are modelled as real gaps rather than smoothed over. When the Tokyo Stock Exchange stops between 11:30 and 12:30, the clock shows a hole, because that is what actually happens to the order book.

What this site does not do

• It is not an official source. We publish market hours for information only. Before anything depends on them, confirm on the exchange's own website and with your broker.
• It is not financial advice. Nothing here is a recommendation to buy or sell anything. Knowing when a market opens tells you nothing about what it will do.
• It does not track you. There is no analytics account, no advertising profile built by us and no newsletter list. What is stored in your browser, and what third parties may set, is spelled out in the privacy and cookies page.

Holidays, and how they go stale

Holiday calendars are the weakest part of any market hours site, including this one. They are set annually by each exchange, they move with religious and lunar calendars, and there is no single machine-readable feed that covers the world. Ours are entered by hand for the current year and marked with the year they belong to. Where we do not have a calendar we say so on the market's page rather than guessing.

If you find an hour or a holiday that is wrong, please write. Corrections are the single most useful thing anyone sends us.