The cadet training system at Virginia Tech has evolved throughout the decades, with each iteration seeking to improve the quality of leader produced by the program. Beginning with the class of 2004, the current cadet training system was implemented. The new cadets officially begin Red Phase upon returning from pass at 1830 (6:30 pm) for their first study hours Sunday evening. A freshman cadet typically has eight-and-a-half hours of unstructured time during a weekday in which to attend classes, study, run errands, and workout. Red Phase, like the color red, is the most intense phase, and the new cadets continue to be trained by their cadre (juniors and seniors who were specifically trained to train the freshmen). They will be expected to learn topics from "The Guidon", the Virginia Tech Corps of Cadets book of knowledge and will be quizzed on topics from the Guidon during "Freshmen Online", more commonly referred to as "onlines". Onlines are conducted Monday through Friday and last for one-half hour. Onlines typically go away at the end of Red Phase. In addition to onlines, freshmen will begin having pass (also known as U-pass or Unity pass) every weekend night, where the cadre will conduct rigorous training reminiscent of New Cadet Week. Common activities during weekend pass include Guidon quizzes, physical training with and without rifles, dragging with and without rifles, and changing into uniforms or remaking beds under time constraints.