I wish this were literally a time-travel trick, but the report from a group of honors students is that the clock at the top right of a textbook assignment tracking how long they've been reading it increases by 4 hours each time they open it after the first. The students that verified this are CISC106 students: Lauren S, Emily R, Aidan H., Elise A., Aaron S. and Aria Kerstetter. Let me know if you want more detail, but I visually confirmed that the clock showed 4 hours and a few minutes on an assignment that they had just opened for a second time.