Abstract: The invention relates to an electronic time registration system comprising at least two computers connected in a computer network, wherein at least one primary computer comprises at least one primary time generator, and at least one secondary computer comprises at least one secondary time generator, wherein each secondary computer furthermore comprises a user interface comprising a device for activating and deactivating a time registration, wherein the activation of the device for a computer results in activation of a secondary time registration in dependency of the computer's secondary time generator and a primary time registration, where activation of the device further results in a current visual time indication of a secondary time registration on the user interface, wherein deactivation of the time registration of the computer by means of the device of the computer for activation and deactivation results in a primary time registration stored in the appropriate storage device, and wherein the deactivation