Parkinson's Law is a concept that states "work expands to fill the time available for its completion." This means that if you have a long deadline for a task, you may take longer to finish it, even if the task could be completed more quickly. The law highlights how time management can affect productivity. The idea was introduced by C. Northcote Parkinson, a British naval historian, in a 1955 essay. He observed that bureaucratic organizations tend to grow in size and complexity, often leading to inefficiency. Understanding this law can help individuals and organizations improve their time management and efficiency.