The term "15th" refers to the ordinal number that comes after the 14th and before the 16th. It is commonly used to indicate a position in a sequence, such as the 15th day of a month or the 15th item in a list. In many cultures, the 15th day of the month can hold significance, such as in the lunar calendar. In the context of dates, the 15th can be associated with various events and holidays. For example, Independence Day in some countries is celebrated on the 15th of a specific month. Additionally, the 15th is often used in scheduling and planning, making it an important reference point in calendars.