Peak hours are the busiest times for teaching, and most students will be online for lessons during this time. iTutorgroup’s peak hours are based on the time in Beijing, and the system automatically selects your fixed schedule according to student demand. However, you can update this fixed schedule once a month. Peak hours. Monday – Friday: 19:30 – 22:30 Peak hours. Saturday & Sunday: 9:30, 10:30, 13:30, 14:30, 19:30, 20:30