A datepicker is a user interface component that allows users to select a date from a calendar. It simplifies the process of entering dates by providing a visual calendar, reducing the chances of errors associated with manual input. Datepickers are commonly used in forms on websites and applications, making it easier for users to choose dates for events, bookings, or deadlines. Typically, a datepicker displays a grid of days, months, and years, enabling users to navigate through time easily. Many datepickers also offer features like date range selection, disabling specific dates, and formatting options. They enhance user experience by streamlining date selection in various digital platforms, including web applications and mobile apps.