The Forex market operates 24 hours a day, five days a week, from Sunday at 5:00 PM EST to Friday at 5:00 PM EST. However, this does not mean that the market is always active and tradable during all of these hours. The market tends to be more active during certain times, which can be beneficial for traders looking to make profitable trades.

The market opens on Sunday at 5:00 PM EST, which corresponds to Monday morning in the Asia-Pacific region. During this time, the market is relatively quiet, with low trading volumes and volatility. As the day progresses, trading activity picks up as European markets open, followed by the North American session.

The most active trading times are during the overlap of the European and North American sessions, which occurs between 8:00 AM and 12:00 PM EST. During this time, traders can expect high volatility and increased trading volume, which can present opportunities for profitable trades. It's important for traders to keep track of the Forex market opening times to plan their trading strategies accordingly.