Parkinson's Law is the adage that "work expands to fill the time available for its completion", suggesting that the duration of a task is dictated by the deadline set for it, rather than by the amount of work involved. This concept implies that if you give yourself a week to complete a two-hour task, then (psychologically speaking) the task will increase in complexity and become more daunting so as to fill that week. It highlights the inefficiencies in time management and suggests the importance of setting appropriate deadlines to increase productivity.