Providing a web-based service featuring technology that allows users to schedule meetings and appointments with others; providing non-downloadable web-based software application for allowing groups of people to share their availability and determine when schedules of individuals overlap; providing a non-downloadable web-based software application that displays individuals' availability on a grid of dates and times; providing a non-downloadable web-based software application that allows users to filter schedules for specific people or groups of people; providing a non-downloadable web-based software application that allows users to transfer their availability from one meeting to another meeting corresponding to the same time range; providing a non-downloadable web-based software application that allows users to schedule multiple events or meetings from a single time grid; providing a non-downloadable web-based software application that allows users to receive desktop notifications in real-time when the availability of another user or users is edited