Within the Timetable Manager module you allocate weeks to control which week of the year is associated with each calendar week.
However, the timetable on the iSAMS dashboard still displays a timetable even if you are in a week which has no allocation (e.g. you are outside of term time).
It would be great if the iSAMS dashboard reflected whether or not a timetable week had been allocation. Typically the lack of an allocation implies that effectively no timetable has been published for that week.