Key takeaways
- The forex market runs about 24 hours a day, five days a week, as trading moves from Asia-Pacific to Europe to North America.
- Session hours are conventions based on local business hours, and their UTC times shift with daylight saving time.
- The London and New York overlap is usually the most active period for major pairs.
- Liquidity, spreads and volatility change through the day, so the session you trade affects your costs and price behavior.
Contents
The forex market does not have a single opening bell. Instead, trading follows the sun: as business hours end in one financial center, they begin in another. These overlapping blocks of activity are known as trading sessions. Knowing when they run helps you understand why prices are quiet at some times and lively at others.
A 24-hour, five-day market
Because forex is traded over the counter between banks and brokers worldwide, there is no central exchange that opens and closes. Trading starts each week when Asia-Pacific centers open on Monday morning local time, which is Sunday evening in UTC, and continues until New York closes on Friday afternoon local time. In between, the market trades around the clock.
The four sessions most often referred to are Sydney, Tokyo, London and New York. Their "hours" are conventions based on local business hours (roughly 8:00 a.m. to 5:00 p.m.), not official rules, and brokers may label their server times differently.
Session times in UTC
The table shows approximate session hours in UTC. Times shift with daylight saving time (DST), so two sets are given.
| Session | Northern-hemisphere winter (approx. Nov–Mar) | Northern-hemisphere summer (approx. Apr–Oct) |
|---|---|---|
| Sydney | 21:00–06:00 UTC | 22:00–07:00 UTC |
| Tokyo | 00:00–09:00 UTC | 00:00–09:00 UTC |
| London | 08:00–17:00 UTC | 07:00–16:00 UTC |
| New York | 13:00–22:00 UTC | 12:00–21:00 UTC |
A few points explain the shifts:
- London and New York move one hour earlier in UTC during their summer time.
- Sydney is in the southern hemisphere, so its summer time runs roughly October to April. Its session moves the opposite way.
- Tokyo does not use daylight saving time, so its UTC hours stay the same all year.
- DST start and end dates differ between the US, UK/Europe and Australia, so for a few weeks each spring and autumn the gaps between sessions change by an hour.
For live, time-zone-aware session times, use the Forex Market Hours tool or the Forex Sessions clock.
What each session tends to look like
Sydney. Usually the quietest major session. Activity often centers on the Australian and New Zealand dollars. Spreads can be wider, especially around the weekly open.
Tokyo. The yen and other Asia-Pacific currencies are often more active. Moves in pairs such as USD/JPY, AUD/USD and AUD/JPY can pick up, although many major pairs trade in narrower ranges than later in the day.
London. Historically the largest forex trading center. Liquidity rises sharply at the London open, and pairs involving the euro, pound and Swiss franc are particularly active.
New York. The US dollar is on one side of most major pairs, and many important US economic releases come out early in the New York morning. Activity often fades in the late New York afternoon.
Session overlaps
When two sessions are open at once, more participants are active, which usually means tighter spreads and more movement.
| Overlap | Winter (UTC) | Summer (UTC) |
|---|---|---|
| Sydney–Tokyo | 00:00–06:00 | 00:00–07:00 |
| Tokyo–London | 08:00–09:00 | 07:00–09:00 |
| London–New York | 13:00–17:00 | 12:00–16:00 |
The London–New York overlap is generally the busiest window for major pairs. Higher activity can also mean higher volatility, so moves can be fast in both directions.
Worked example: converting sessions to your local time
Assume you live in India, which uses India Standard Time (UTC+5:30) and does not observe daylight saving time.
- Winter London–New York overlap: 13:00–17:00 UTC + 5:30 = 18:30–22:30 IST.
- Summer London–New York overlap: 12:00–16:00 UTC + 5:30 = 17:30–21:30 IST.
- Tokyo session (all year): 00:00–09:00 UTC + 5:30 = 05:30–14:30 IST.
Use the same method for any time zone: add or subtract your offset from UTC, and remember to check whether your own country, or the financial center, is on daylight saving time.
Why sessions matter to a beginner
- Costs vary. Spreads are often wider in quiet periods and around the daily rollover.
- Behavior varies. A pair that drifts in a narrow range during one session may move sharply in another.
- News timing. Scheduled economic releases cluster in certain hours. Check the Economic Calendar before trading.
- Your schedule. It is better to trade during hours you can actually monitor than to stay up late for the busiest window.
See What is spread? for how liquidity affects costs.
Common mistakes
- Forgetting daylight saving changes and arriving an hour early or late for a session.
- Assuming the market is equally active all day.
- Trading thin markets with wide spreads, such as just after the weekly open.
- Ignoring weekend gaps. Prices can open on Monday well away from Friday's close.
Summary
Forex trades almost continuously from Sunday evening to Friday evening UTC, passing through the Sydney, Tokyo, London and New York sessions. Session times are conventions that shift with daylight saving time, except for Tokyo. Overlaps, especially London–New York, tend to bring the most liquidity and movement, while quiet periods can mean wider spreads. Matching your trading to sessions you can monitor, and checking the times with the Forex Market Hours tool, helps you manage both cost and risk.
Glossary terms in this lesson
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Practice worksheet
Practice worksheet
5 exercises to try on paper. Print it, save it as a PDF from the print dialog, or download a plain-text copy.
- Convert the approximate London session (winter: 08:00–17:00 UTC) into your local time zone.
- Work out the London–New York overlap in your local time for both winter and summer.
- Explain why Tokyo's session times in UTC stay the same all year.
- List two pairs you would expect to be active during the Tokyo session and explain why.
- Using the Forex Market Hours tool, note which sessions are open at the time you usually have free to trade.
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