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Similar to Seasonal Affective Disorder, SMD occurs at the same time every year, typically the late September to Early October (unless you are on the quarter system in which case F*** you). Symptoms include long hours in the library, lack of hygiene and exercise, and even in rare cases transport to an alternate dimension where everyone is sleep deprived and has a constant headache. Typically only last 1-2 weeks, but if your professor is one of these guys: "I'm going to have my midterm on the off weeks so that you guys aren't overwhelmed", it can last the entire semester.
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