Google Calendar is a free time-management web application

With the help of Google Calendar, events are stored online, meaning that the calendar can be viewed from any location that has Internet access. In the case of a user experiencing a hard drive failure, it also means that no data is lost. The application can import Microsoft Outlook calendar files (.csv) and iCalendar files (.ics, the de facto open calendaring file format). Multiple calendars can be added and shared, allowing various levels of permissions for the users. Google Calendar allows multiple calendars to be created and shown in the same view. Each can be shared, either read-only or with full edit control, and either with specified people or with everyone (public calendars). In February 2009, Google discontinued the option of searching for public calendars from the search field by removing the "Search Public Events" button. It also disabled its public calendar gallery, citing maintenance and usability issues. The company suggests adding calendars via the "Interesting Calendars" feature, known calendar URL-s, or via email requests to friends. Daily "To Do" tasks cannot currently be shared between users