Outlook Calendar is a scheduling tool integrated into the Microsoft Outlook application. It allows users to create, manage, and share events, appointments, and reminders. The calendar can be accessed on various devices, making it easy to stay organized and keep track of important dates. Users can customize their calendars by setting recurring events, adding notes, and inviting others to meetings. Outlook Calendar also syncs with other calendars, enabling seamless integration with personal and professional schedules. This feature helps users manage their time effectively and ensures they never miss an important commitment.