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Forex Session Clock
Check which major forex market sessions are open from a UTC time, including Sydney, Tokyo, London, New York, current overlaps and the next opening or closing boundary.
UTC market time
Session status
| Session | Status | Opens in | Closes in |
|---|
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The standard UTC reference windows are Sydney 21:00-06:00, Tokyo 23:00-08:00, London 07:00-16:00 and New York 12:00-21:00. The most watched overlap is London-New York, from 12:00 to 16:00 UTC in this reference model. These are standard UTC windows; actual broker-server times can shift with DST.
How it works
What this clock shows
This is a market-hours reference, not a pricing feed. It checks one UTC time against four standard session windows: Sydney, Tokyo, London and New York. Sessions that cross midnight, such as Sydney and Tokyo, are handled as wraparound windows on a 24-hour UTC clock.
The standard UTC windows
- Sydney: 21:00-06:00 UTC
- Tokyo: 23:00-08:00 UTC
- London: 07:00-16:00 UTC
- New York: 12:00-21:00 UTC
Important: these are standard UTC session windows; each market's actual open and close can shift with daylight saving time. London and New York commonly move by one hour during DST periods, while Sydney and Tokyo do not move the same way. Your broker may display everything in server time, so always confirm the exact session boundary against your broker platform.
How overlaps are calculated
The engine marks a session open when the UTC minute is inside its window. A normal window uses start <= time < end. A cross-midnight window uses time >= start or time < end. After that, any two open sessions are listed as an overlap.
Why the London-New York overlap matters
London and New York are the two largest institutional trading centers. In the standard reference model, they overlap from 12:00 to 16:00 UTC. That window often has the deepest liquidity and the most active price discovery for major USD pairs. This is a market-structure observation, not a promise that spreads, fills or volatility will behave a certain way on your broker.
Next open or close event
For every session, the clock calculates minutes to the next opening boundary and the next closing boundary on a 1,440-minute ring. The closest relevant boundary becomes the next event: an open event for a currently closed session, or a close event for a currently open one.