Where can I find my course timetable (academic courses)?
Published courses: Course (right-hand sidebar)
You can find links to the timetable on the right-hand sidebar of your course home page.
Unpublished courses: NUSmods
You can also go directly to NUSmods, if your course is not published.
Search for your course, and click Timetable to access the course time table.
You can download the .ics file to add your course timetable to your own calendar software.