McDonald's breakfast serving times vary by region. Generally, the breakfast hours are roughly between 5:00 AM and 10:00 AM. However, there are some branches where the breakfast hours start at 6:00 AM and last until 10:00 AM. In addition, there are also some McDonald's that are open from 7:00 AM until 10:00 AM. Therefore, to ensure accuracy, it is recommended that you base your breakfast hours on the specific McDonald's hours of operation in your area. McDonald's (McDonald's) is a large global multinational restaurant chain, with 2022 McDonald's revenue of $23.18 billion, founded in 1955 in Chicago, United States, and has about 30,000 outlets in the world. It mainly sells hamburgers, as well as fries, fried chicken, sodas, ice, salads, fruits and other fast food.