The invention relates to a method and a system (SYS) for managing an alarm signal in a system comprising a first internal clock. The system is intended to cooperate with a portable player (PP) comprising a second internal clock and a screen (S). The method comprises the steps of: - setting the time of said first internal clock at the time of said second internal clock, - selecting a given time value being displayed on said screen, - memorizing said given time value in said system, - setting the time of said second internal clock at the time of said first internal clock, - triggering an alarm signal on said system when the time of said first internal clock reaches said given time value. According to this method, when the portable player is docked to the system,the system according to the invention does not require its own screen because the screen of the portable player is used to display the current time and the alarm time during setting it, resulting in a reduction of the costs of the system.