The Difference Between a Day, a Date, and a Year
A date is a specific day on the calendar. A day is a 24-hour time period that starts at midnight and ends at midnight. A year consists of 365 days, each with an average length of about 24 hours.
In other words, a day is a continuous-time period that lasts 24 hours. A date is a single-day event that falls within a particular time frame and a year is a continuous period that is 365 days long.