The forex market is open around the clock from Sunday evening to Friday evening, but activity rotates through Sydney, Tokyo, London and New York rather than staying equally liquid all day. A common UTC reference is Tokyo 00:00–09:00, London 07:00–16:00 in northern summer and 08:00–17:00 in winter, and New York 12:00–21:00 in summer and 13:00–22:00 in winter. The London–New York overlap is usually the busiest window. These are liquidity-session guides, not a universal broker timetable; daylight saving time, holidays, broker maintenance and server time can change what you actually see on a trading platform.
For broader market structure, risk and funded-trading education, the AIFO prop trading guides connect session timing with execution, risk controls and account rules. Market hours tell you when participation is concentrated. They do not tell you that every hour inside a session offers the same trading conditions.
Forex Market Hours at a Glance
Forex trading moves through four major financial centres across the weekday cycle: Sydney, Tokyo, London and New York. The table below uses common session reference windows rather than promising an exact timetable for every broker or instrument.
UTC is the cleanest base for comparing sessions because local clocks in London, New York and Sydney change during the year.
| Session | Local reference | Northern summer UTC | Northern winter UTC | Markets commonly watched | Main timing issue |
|---|---|---|---|---|---|
| Sydney | About 08:00–17:00 Sydney time | 22:00–07:00 | 21:00–06:00 | AUD, NZD and early Asia-Pacific flows | Australian daylight saving runs on a different seasonal cycle from Europe and North America |
| Tokyo / Asian | About 09:00–18:00 JST | 00:00–09:00 | 00:00–09:00 | JPY, AUD, NZD and Asian regional flows | Japan does not use daylight saving time |
| London | About 08:00–17:00 London time | 07:00–16:00 | 08:00–17:00 | EUR, GBP, CHF and major USD pairs | UTC conversion moves when the UK changes between BST and GMT |
| New York | About 08:00–17:00 New York time | 12:00–21:00 | 13:00–22:00 | USD, CAD and major USD pairs | UTC conversion moves when the US changes between EDT and EST |
Session labels describe common liquidity-centre windows. Your broker’s tradable hours, maintenance period, symbol schedule and server clock can differ.
Why Is the Forex Market Open 24 Hours a Day?
The weekday forex market does not stay open because one exchange operates for 24 hours. Activity passes between financial centres as the business day moves around the world.
Spot foreign exchange is an over-the-counter market rather than a single central exchange with one opening bell. Sydney and the wider Asia-Pacific region begin the cycle, Tokyo builds Asian participation, London brings European flow, and New York adds North American flow before the cycle returns towards Asia.
The 2025 BIS Triennial Survey reported average OTC foreign-exchange turnover of about $9.6 trillion per day in April 2025. Sales desks in the United Kingdom accounted for roughly 38% of global turnover and the United States about 19%, while the UK, US, Singapore and Hong Kong together accounted for about three quarters of turnover.
Those figures describe where sales desks are located. They should not be read as a claim that the London session itself produces exactly 38% of every trading day’s volume.
What Are the Asian Forex Market Hours?
The Asian session is usually anchored to Tokyo, with a common reference window of about 00:00–09:00 UTC. Sydney is already active before Tokyo opens, so the wider Asia-Pacific trading period begins earlier than the Tokyo label suggests.
Japan does not use daylight saving time. That makes Tokyo one of the easier major sessions to track against UTC.
How the Asian Session Usually Trades
JPY, AUD and NZD pairs often receive more regional participation during Asian hours because Japan, Australia, New Zealand and other Asian financial centres are active. European currencies can still move, but the participant mix is different from London hours.
Do not reduce the Asian session to “low volatility” or “range trading”. A Bank of Japan decision, Australian data, Chinese economic news or an unexpected regional headline can change conditions quickly.
The cleaner way to use the session is to ask which currency centres are active and whether a scheduled event is capable of changing the normal liquidity pattern.
What Time Is the London Forex Session?
London is commonly treated as an 08:00–17:00 local-time session. In UTC, that usually means 07:00–16:00 while the UK is on British Summer Time and 08:00–17:00 while the UK is on Greenwich Mean Time.
This is one reason a trader should not permanently hard-code “London open = 08:00 UTC”. It is only correct during part of the year.
Why London Matters to Forex Traders
London sits at the centre of a large share of global FX dealing activity. European banks, institutional desks, corporate flows and other market participants become active across the same broad period.
EUR and GBP pairs often gain participation around the European morning, while major USD pairs also become active as London trades towards the North American handover.
A session open can produce faster movement, but it is not a signal by itself. A breakout with no supporting order flow can still fail, and a quiet London morning can remain quiet when the macro calendar is empty.
Traders who want to watch the opening period in practice can use AIFO’s London Open market analysis alongside their own market and risk plan.
What Time Is the New York Forex Session?
New York is commonly treated as an 08:00–17:00 local-time session. That converts to roughly 12:00–21:00 UTC during EDT and 13:00–22:00 UTC during EST.
The strongest participation often appears during the first part of New York because London is still open at the same time.
USD and CAD pairs naturally receive close attention during North American hours. US inflation, employment, growth and central-bank releases can also produce abrupt changes in volatility and execution conditions.
A session with more participants does not remove event risk. A major release can create faster price changes, temporary spread expansion and slippage even when underlying liquidity is deep.
For prop accounts, a scheduled event can also interact with account rules. Check the relevant high-impact news trading rules before treating a major data release as an ordinary session trade.
When Is the London and New York Forex Overlap?
The London–New York overlap is the period when both major financial centres are active. It is usually one of the highest-participation windows of the forex day.
When UK and US seasonal clocks are aligned, a common UTC reference is:
- Northern summer: approximately 12:00–16:00 UTC.
- Northern winter: approximately 13:00–17:00 UTC.
Major EUR, GBP and USD pairs often have deeper participation during this period. That can support tighter normal-market spreads and more active price discovery.
Do not turn that into “the overlap is always the best time to trade”. The same hours also contain many high-impact UK, European and US events. A trader can have strong liquidity and violent price repricing at the same time.
How Daylight Saving Time Changes Forex Sessions
Daylight saving time changes the UTC conversion of London and New York even though traders often describe each session using the same local clock. The harder problem is that the UK and US do not change clocks on the same dates.
For 2026, the UK government timetable moves the UK into BST on 29 March and back to GMT on 25 October. The US daylight-saving timetable runs from 8 March to 1 November 2026.
That creates short periods in March and late October when the usual UTC relationship between London and New York is different from the rest of the season.
The DST Transition-Week Trap
A fixed session indicator can be one hour wrong if it assumes London and New York change clocks together. Historical backtests can suffer from the same problem if session labels are applied to UTC data without date-aware timezone conversion.
The safer method is to store the session against its home timezone, then convert the exact date into UTC or your local time. Do the same for economic events.
Tokyo is simpler because Japan remains on JST throughout the year.
How Forex Sessions Affect Liquidity, Spreads and Volatility
Market hours change who is active, which currencies are receiving local flow and how much depth is available. That can change the execution environment even when the technical setup looks identical.
The key word is can. Session behaviour is a market condition, not a promise.
| Trading period | Typical participation | Spread behaviour | Volatility behaviour | Execution consequence | Main risk check |
|---|---|---|---|---|---|
| Early Asia-Pacific | Lower participation in many European and North American pairs | Some pairs may trade with wider spreads | Often quieter unless regional news is active | Breakouts can have less follow-through on pairs outside the region | Check the active currencies rather than assuming every pair is quiet |
| Tokyo / Asian | Stronger JPY, AUD and NZD participation | Pair-dependent | Can increase around Asian economic releases | Regional pairs can respond more directly to local data and policy | Check Japan, Australia, New Zealand and China event timing |
| London open | European participation rises | Major EUR and GBP pairs often gain depth | Movement can accelerate from the Asian range | Entries may face faster price movement than during late Asia | Do not size a London-open trade from a quiet Asian stop distance |
| London–New York overlap | Both major centres active | Normal-market spreads can be competitive on major pairs | Often one of the more active periods | Fast fills and fast adverse movement can exist together | Check US and European news before assuming liquidity means low execution risk |
| Late New York | European participation has faded | Conditions can become thinner on some pairs | Often lower unless a US event is active | Short-term setups may behave differently from the overlap | Watch rollover, provider maintenance and changing spread conditions |
If trading cost matters to a short-duration strategy, check live conditions rather than assuming the session name gives you a fixed number. AIFO traders can review current information around AIFO trading spreads before using a session-based cost assumption.
Which Forex Session Fits Different Trading Styles?
A useful session is one that matches the currency pair, holding period and execution style. There is no single time window that is automatically better for every trader.
Intraday traders usually care more about session changes because their entry, stop distance and target may all sit inside one liquidity window. Swing traders can still care about timing, but their main exposure may survive several sessions.
Asian Session
Traders focused on JPY, AUD or NZD pairs may have more reason to watch Asian hours. Range-based approaches can also find quieter periods useful, but only when the actual market is behaving that way.
London Session
EUR and GBP traders often receive more market participation after Europe opens. Breakout and trend-following traders may watch how price responds as European order flow enters the market.
London–New York Overlap
Short-duration traders often prefer this window because participation is broad and major USD pairs are active. The trade-off is event risk. More activity means price can travel quickly in both directions.
Session selection should sit inside the same risk process as stop placement and trade size. The AIFO guide to forex position sizing explains why a wider stop or faster session should change cash risk rather than simply increasing the amount lost at the stop.
Forex Session Time Is Not the Same as Broker Server Time
One of the most common timing mistakes is treating a session label, local clock and trading-platform clock as the same thing. They are separate references.
A trader should keep at least three clocks:
- Session clock: when a financial centre is broadly active.
- Platform/server clock: how the broker timestamps candles, orders, rollover and account activity.
- Event clock: the timezone attached to economic releases and central-bank announcements.
Prop accounts can add a fourth clock: the rule clock. Daily-loss resets, restricted trading windows and other account conditions may be calculated from server time rather than the trader’s local time.
That is why the clock displayed in an MT5 Web Terminal matters even when you already know that London has opened. AIFO account holders should also verify the published AIFO server time before converting rule resets or event windows into local time.
Alpha Insight
The real timing risk is using the right session on the wrong clock. A trader can correctly identify the London session and still mistime an order because the chart uses a different server timezone, an economic release is quoted in another timezone, or a prop-account reset follows server time. DST transition weeks make the mismatch easier to miss. Session time describes where market participation is concentrated; it does not replace the platform clock, event clock or account-rule clock.
Forex Market Hours FAQ
Yes, during the trading week. Retail spot forex is generally available from Sunday evening to Friday evening, while weekend execution is normally closed. Exact open, close and maintenance times depend on the broker or provider.
London is commonly treated as 08:00–17:00 local London time. In UTC, that is typically 07:00–16:00 during BST and 08:00–17:00 during GMT.
New York commonly runs 08:00–17:00 local New York time. In UTC, that is typically 12:00–21:00 during EDT and 13:00–22:00 during EST.
The Asian session is usually anchored to Tokyo, commonly 09:00–18:00 JST, or about 00:00–09:00 UTC. Sydney starts earlier and overlaps part of the Asia-Pacific trading day.
When both centres are on aligned seasonal clocks, the overlap is commonly 12:00–16:00 UTC in northern summer and 13:00–17:00 UTC in northern winter. During the short UK-US DST mismatch weeks, the UTC overlap can shift or extend.
Yes. London and New York keep broadly stable local office-hour references, but their UTC conversions move with daylight saving time. The UK and US change clocks on different dates, so fixed UTC session indicators can be wrong during transition weeks.
