Disclosed are examples of systems, apparatus, methods and computer program products for displaying reduced and detailed visual representations of calendar items based on mouse cursor movement. A database storing data objects identifying calendar items can be maintained. Each calendar item can comprise a subject, a date, and a time range. A reduced visual representation of a first calendar item can be displayed in a first region of a user interface on a display of a device. The reduced visual representation of the first calendar item can comprise an at least partially obscured presentation of the subject, the date, and/or the time range of the first calendar item. Mouse cursor movement in the first region of the user interface can be detected. A detailed visual representation of the first calendar item can be displayed in the first region of the user interface in response to detecting the mouse cursor movement.