Everyone knows the stigma surrounding syllabus week in college. Syllabus week is the first week of a new semester where professors give no work and all they do during class is go over the syllabus and what is expected in that class for the next several weeks. That means students go out every night, stay up late, and party to their hearts' desire.
Even though not everyone has the same Sylly Week experience, pretty much everyone can relate to the mood the week after.