I realized that to trade U.S. stocks, you need to know the exact U.S. stock trading hours. At first, I was really confused because of the time zone difference, but once I organized everything, it became much easier. Because the U.S. observes daylight saving time and has a big time difference from Korea, it’s easy to miss the right trading timing if you don’t know the schedule.

First, it’s good to familiarize yourself with the three major U.S. stock exchanges. NYSE is a long-established exchange that began in 1792. About 2,400 companies are listed there, and it is the largest exchange in the world. Traditional large-cap stocks such as Berkshire Hathaway, Johnson & Johnson, and Visa are mainly traded there. NASDAQ was founded in 1971 and is a relatively newer exchange, with many IT companies—so you can trade tech stocks like Apple, Microsoft, and NVIDIA. AMEX operates with a focus on mid-sized and small businesses.

Now, let’s sort out U.S. stock time zones. All three exchanges operate on the same schedule. Regular trading hours are from 09:30 to 16:00 Eastern Time. In Korean time, that’s from 23:30 to 06:00 the next day. During the period when daylight saving time is currently in effect, it shifts one hour earlier, from 22:30 to 05:00. Daylight saving time runs from the second Sunday in March to the first Sunday in November, so please keep that in mind.

In addition, there are pre-market and after-hours sessions. Pre-market trading is from 04:00 to 09:30 ET, which corresponds to 18:00 to 23:30 Korean time (or 17:00 to 22:30 during daylight saving time). After-hours trading runs from 16:00 to 20:00 ET, which corresponds to 06:00 to 10:00 the next day in Korean time (or 05:00 to 09:00 during daylight saving time).

The key point is that during U.S. stock trading hours, the transaction currency is U.S. dollars, and settlement is completed two business days later. Another big difference from the Korean market is that the U.S. has no price limit bands. Since the market operates overnight in Korea, it may be hard to respond quickly when prices drop sharply, so you should definitely take this into account when making your trading plan.

Next, it’s also a good idea to check the 2026 market closure days. The exchanges are fully closed on 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.

There are also early closing days. On July 2 (the day before Independence Day), on November 27 (the day after Thanksgiving), and on December 24 (Christmas Eve), the market closes at 13:00 Eastern Time. In Korean time, that means early closure at 2:00 a.m. the next day (or 1:00 a.m. during daylight saving time).

If you trade stocks from other countries, this information can be useful as well. The Korea Exchange operates from 09:00 to 15:30. The Tokyo Stock Exchange operates from 09:00 to 15:00 (with a break from 11:30 to 12:30). The London Stock Exchange operates from 08:00 to 16:30 (which is 17:00 to 01:30 in Korean time, or 16:00 to 00:30 during daylight saving time). The Hong Kong Stock Exchange operates from 09:30 to 16:00 (with a break from 12:00 to 13:00, corresponding to 10:30 to 17:00 in Korean time, and a break from 13:00 to 14:00). The Shanghai Stock Exchange operates from 09:30 to 15:00 (with a break from 11:30 to 13:00, corresponding to 10:30 to 16:00 in Korean time, and a break from 12:30 to 14:00).

Accurately understanding U.S. stock trading hours is really important. If you know the trading times and closure days properly, you can set up your investment strategy more efficiently. Since exchange schedules can change, please always trade while checking the latest information.