The foreign exchange market, also known as the forex market, is a global decentralized market where currencies are traded. Forex trading hours refer to the time during which forex market participants can buy, sell, exchange, and speculate on currencies.

The forex market operates 24 hours a day, five days a week. It starts on Sunday evening (Eastern Standard Time) with the opening of the Asian session and continues until Friday evening with the closing of the U.S. session. However, please note that trading hours may vary depending on daylight saving time changes in different countries.

Here are the approximate forex trading hours in different major financial centers:

1. Sydney Session (Asian Session):

   • Opening: Sunday 5:00 PM EST
   • Closing: Monday 2:00 AM EST

2. Tokyo Session (Asian Session):

   • Opening: Sunday 7:00 PM EST
   • Closing: Monday 4:00 AM EST

3. London Session (European Session):

   • Opening: Monday 3:00 AM EST
   • Closing: Friday 12:00 PM EST

4. New York Session (U.S. Session):

   • Opening: Monday 8:00 AM EST
   • Closing: Friday 5:00 PM EST

It's worth noting that there is overlap between sessions, providing opportunities for increased trading activity. For example, during the overlap of the London and New York sessions, there tends to be higher trading volume and volatility in the market.

Additionally, it's important to be aware of news releases, economic events, and holidays that can impact market liquidity and volatility. Some forex brokers may also have specific trading hours or restrictions, so it's advisable to check with your broker for their specific trading hours.

Keep in mind that forex trading can be highly speculative and involves risks. It's essential to have a good understanding of the market and implement appropriate risk management strategies when engaging in forex trading.