Stock market opening hours range from the beginning of the day to the end of the day, depending on the geographic area in which the stock exchange is located. You can find the opening and closing hours of the world's main stock exchanges in the following table:

New York Stock Exchange (NYSE)
Market opening: 09:30 AM (EST),
Market closes: 04:00 noon (EST)

Nasdaq Stock Exchange (NASDAQ)
Market opening: 09:30 AM (EST),
Market closes: 04:00 noon (EST)

Tokyo Stock Exchange (TSE)
Market opening: 09:00 AM (JST),
Market closes: 03:00 noon (JST)

Hong Kong Stock Exchange (HKEX)
Market opening: 09:30 am (HKT),
Market closes: 04:00 noon (HKT)

London Stock Exchange (LSE)
Market opening: 08:00 am (GMT),
Market closes: 04:30 noon (GMT)

Euronext Paris
Market opening: 09:00 AM (CET),
Market closes: 05:30 noon (CET)

Frankfurt Stock Exchange (Deutsche Börse)
פתיחת השוק: 08:00 בבוקר (CET),
סגירת השוק: 10:00 בערב (CET)

בורסת סידני (ASX)
פתיחת השוק: 10:00 בבוקר (AEDT),
סגירת השוק: 04:00 בצהריים (AEDT)