Time-restricted eating, also called time-restricted feeding, is a form of intermittent fasting where you only eat during a certain set of hours during the day. The eating window is typically beyond the normal eight to 12-hour fast you experience when you sleep.
One of those most common examples of this is the 16:8 diet, also called Leangains, where you fast for 16 hours and only eat during an eight-hour window, such as between 12 noon and 8 p.m. Although the window hours may vary, people who follow this diet plan tend to stick to the same schedule every day.
Another example is the Warrior Diet, where your eating window is only four hours or less. People typically fast all day and just have one large meal, usually at night. During the fasting window people can consume minimal calories from raw fruits and veggies or dairy products, but are encouraged to wait and eat the bulk of their calories during the four-hour window.