Q. Regarding Group Study Room reservations, how is "72 hours before" calculated?
Library group study rooms are made available to book 3 days in advance of the booking time, and weekend days are counted. The start time of a reservation needs to be 72 hours or less in the future from the time at which the booking is created (i.e. whole days aren't opened up for booking all at once: it's a rolling 72 hour window for allowable booking start-times).