What is the origin year of IHOP?

The origin year of IHOP is 1958. This is the year when the first International House of Pancakes restaurant opened in Los Angeles, California. The establishment was founded by Jerry Lapin, Albert Kallis, and Jeannot Zatz, with an aim to create a casual dining experience centered around breakfast foods, particularly pancakes. Over the years, IHOP has grown significantly, becoming a well-known brand in the dining industry, recognized for its extensive menu featuring not only pancakes but also a variety of other breakfast items, lunch, and dinner options. This historical context highlights why 1958 is the correct answer when determining the founding year of IHOP.