An online booking calendar is a digital tool used by healthcare providers to facilitate the scheduling of patient appointments through an interactive, web-based interface. This system allows patients to view available time slots and book appointments at their convenience, often integrating with electronic health records for seamless management. The online booking calendar improves efficiency by reducing the need for manual scheduling, decreasing no-show rates with automated reminders, and enabling real-time updates. It enhances patient accessibility and satisfaction by providing a user-friendly platform for managing healthcare appointments, contributing to a more streamlined and responsive healthcare service.