Do you ever get confused about the timing when trading U.S. stocks? I also made a few mistakes at first because of U.S. holidays and daylight saving time, but after organizing it once, it became much easier.

The U.S. stock markets include three exchanges: NYSE, NASDAQ, and AMEX, and their trading hours are all the same. Regular trading hours are from 09:30 to 16:00 Eastern Time, which is from 23:30 to 06:00 Korean Time (during daylight saving time, 22:30 to 05:00). It's like trading overnight.

But here’s an important point: U.S. holidays. On days when the U.S. market is closed due to holidays, you need to know in advance. As of 2026, the holidays are New Year’s Day on January 1, Martin Luther King Jr. Day on January 19, Presidents’ Day on February 16, Good Friday on April 3, Memorial Day on May 25, Juneteenth on June 19, Independence Day on July 3, Labor Day on September 7, Thanksgiving on November 26, and Christmas on December 25.

You can also take advantage of pre-market hours. Pre-market trading is available from 04:00 to 09:30 Eastern Time (which is 18:00 to 23:30 Korean Time, and 17:00 to 22:30 during daylight saving time). There’s also after-hours trading from 16:00 to 20:00 Eastern Time (which is the next day 06:00 to 10:00 Korean Time, and 05:00 to 09:00 during daylight saving time).

Another thing to watch out for is early market closures around U.S. holidays. On the day before Independence Day, the day after Thanksgiving, and Christmas Eve, the market closes early at 1:00 PM Eastern Time. For 2026, July 2, November 27, and December 24 are early close days, so be especially careful on those dates.

All three exchanges—NYSE, NASDAQ, and AMEX—trade in U.S. dollars, and settlement occurs two business days later. Unlike the Korean market, there are no price limit bands, which is also important. Since trading happens overnight Korean time, it can be hard to respond quickly to sharp drops, so be sure to consider this when planning your trades.

Don’t forget daylight saving time either. From the second Sunday in March to the first Sunday in November, clocks move forward by one hour, so trading hours are effectively one hour earlier. During seasons with many U.S. holidays, it’s especially helpful to check the calendar frequently.

If you’re also watching other markets, here’s a quick reference: Korea Exchange (09:00–15:30), Tokyo (09:00–15:00, closed from 11:30 to 12:30), London (17:00–01:30, and 16:00–00:30 during daylight saving time), Hong Kong (10:30–17:00, closed from 13:00 to 14:00), and Shanghai (10:30–16:00, closed from 12:30 to 14:00).

In conclusion, to trade U.S. stocks effectively, you need to consider regular trading hours, pre-market and after-hours trading, U.S. holidays, and daylight saving time. It may seem complicated at first, but after a few trades, it becomes natural. Always check the latest exchange information and plan your trades in advance—this will bring you one step closer to successful investing.