The word ‘day’ refers to a period of 24 hours that begins at midnight and ends at the following midnight. It is commonly divided into daytime, when it is light outside, and nighttime, when it is dark. Additionally, ‘day’ can also refer to a specific period or occasion, such as a particular date (e.g., “the day of the event”) or a more general concept of time. In a broader sense, ‘day’ can also signify the time spent engaged in activity, as in “a busy day.”