Information display apparatus and information display method, a program, and a communication system

The present disclosure, the information display apparatus and method information displayed to be able to provide a device which utilizes an excellent display device flexibility, a program, and to a communication system. Information display device includes at least a time information presentation unit that presents the time information, a display unit composed of a band portion for mounting on the arm, and a display control unit for changing the display of the display unit. The present disclosure can be applied to, for example, the information display device or the like.