Calendar software is a digital tool that helps users organize and manage their schedules. It allows individuals to create, edit, and share events, appointments, and reminders. Many calendar applications also offer features like notifications, recurring events, and integration with other tools, making it easier to keep track of personal and professional commitments. Popular examples of calendar software include Google Calendar, Microsoft Outlook, and Apple Calendar. These applications can be accessed on various devices, such as smartphones, tablets, and computers, ensuring that users can stay updated on their schedules anytime and anywhere.