The term "Twenty-Ninth" typically refers to the ordinal number that comes after twenty-eight and before thirtieth. It is often used to indicate a position in a sequence, such as the twenty-ninth day of a month or the twenty-ninth item in a list. In various contexts, it can also refer to anniversaries or events that occur on the twenty-ninth day. In some cultures, the twenty-ninth day of February is significant because it only occurs during a leap year, which happens every four years. This day is associated with February, the second month of the year, and is often celebrated by those born on this date, known as "leap year babies."