Apple Calendar is a time management application developed by Apple Inc. for its operating systems, including iOS and macOS. It allows users to create and manage events, set reminders, and organize their schedules. The app integrates seamlessly with other Apple services, such as iCloud, enabling users to access their calendars across multiple devices. Users can customize their calendars by adding different views, such as daily, weekly, or monthly layouts. Apple Calendar also supports sharing calendars with others, making it easy to coordinate events and appointments. Notifications can be set to remind users of upcoming events, ensuring they stay organized and on track.