Google Calendar is a time-management and scheduling tool developed by Google. Available on both web and mobile platforms, it allows users to create, edit, and manage events in a virtual calendar. Users can share calendars with others, send event invites, and receive reminders, making it a powerful tool for personal organization and collaborative scheduling. Google Calendar supports multiple views, including daily, weekly, and monthly overviews. It can sync with other calendar services and integrates seamlessly with other Google services like Gmail and Google Tasks. Its features make it a popular choice for both personal use and business use.