Approaches are provided for managing an electronic calendar using short message service (SMS). Specifically, an approach is provided that is implemented in a computer infrastructure having computer executable code tangibly embodied on a computer readable storage medium having programming instructions operable to receive an SMS text message including an SMS command to manage an electronic calendar with at least one pre-existing event. The SMS command includes an instruction to modify the at least one pre-existing event. The programming instructions are further operable to execute the SMS command such that the at least one pre-existing event is modified.