This study measures students' unintentional procrastination, as captured by 'the number of days delayed,' or 'delay.' 'Delay' is the difference between the day that a student indicated that he or she would work on a homework assignment, and the day that he or she actually worked on that assignment as recorded by Blackboard. Regression results demonstrate that 'delay' is negatively associated with homework score, grade in principles of micro-and-macroeconomics, as well as cumulative GPA. Furthermore, starting homework "later than one's plan" matters more than starting homework late "per se." Finally, students do not update their priors about their own behavior.