2Division of Sleep and Circadian Disorders, Brigham and Women’s Hospital, Harvard Medical School, Boston, MA, United States.
As such, they are sometimes assigned a theoretical 12th-time zone called Anywhere on Earth (AoE). But since they constitute the world's westernmost landmasses regarding the International Date Line, these islands are considered the last places on Earth where any date exists. The 12th Time ZoneĪs mentioned earlier, Baker Island and Howland Island are uninhabited territories in the US. Therefore, only six US states have corresponding DST time zones. Not all US states observe Daylight Saving Time, and these include Hawaii and the five dependencies. With these time zones, 4 are standard time zones, and Alaska, Hawaii, and five US dependencies have their time zones. However, two additional time zones were observed in its uninhabited territories, Baker Island and Howland Island. Initially, the United States had nine time zones that were approved by the law. The United States observes nine time zones that's why familiarizing yourself with them is essential to avoid time confusion when traveling. If you have never been to this country before, you might need to understand a few things about the US, including its time zones. Others want to meet different locals, learn their culture, and try the US' signature dishes. Some want to visit this country because of its countless tourist attractions, perfect for adventures. Traveling to the United States is a dream for many.