The Sydney session in the foreign exchange market, commonly referred to as Forex, is a pivotal component of global trading due to its strategic geographical location. The Sydney session opens at 10:00 PM GMT (Greenwich Mean Time) and closes at 7:00 AM GMT. However, it's important to note that Sydney observes daylight saving time, which affects the session's opening and closing hours.

During daylight saving time, which typically begins on the first Sunday in October and ends on the first Sunday in April, the Sydney session opens at 9:00 PM GMT and closes at 6:00 AM GMT. This shift occurs because Sydney moves its clocks forward by one hour during this period, aligning its trading hours more closely with those of other major financial centers, such as Tokyo and Hong Kong.

The Sydney session is known for its liquidity, as it overlaps with the Tokyo session for a few hours, creating an active trading environment. This overlap, combined with the global significance of the Australian dollar (AUD) in Forex, makes the Sydney session a key time for traders looking to capitalize on market movements in the Asia-Pacific region. Understanding the opening and closing times of the Sydney session is essential for traders to strategize effectively and take advantage of opportunities in the Forex market.