A device for adjusting horological functions of a timepiece, the device being equipped with a mechanism for selection and actuation comprising - a drive means (9, 109), - a driving pinion (1, 101), said drive means being configured to drive said driving pinion in the clockwise direction and in the anti-clockwise direction, - at least one driven pinion (2, 3, 102, 103) adapted to be driven by said driving pinion (1, 101) when the driving pinion (1, 101) turns in the clockwise direction and when said driving pinion (1, 101) turns in the anti-clockwise direction, said driven pinion (2, 3, 102, 103) being configured to move into a first position under the effect of the driving pinion (1, 101) when this turns in the clockwise direction, in which first position said driven pinion (2, 3, 102, 103) actuates an actuating means (A, A) of a first horological function, and to move into a second position under the effect of the driving pinion (1, 101) when this turns in the anti-clockwise direction, in which second position said driven pinion (2, 3, 102, 103) actuates an actuating means (B, B') of a second horological function, said driven pinion (2, 3, 102, 103) not actuating the actuating means (A, A') of the first horological function when it is in its said second position and, vice versa, said driven pinion (2, 3, 102, 103) not actuating the actuating means (B, B') of the second horological function when it is in its said first position, characterized in that said mechanism for selection and actuation comprises at least two driven pinions (2, 3, 102, 103), and in that the adjusting device furthermore comprises a control mechanism adapted to selectively bring the driving pinion (1, 101) to mesh with each of said driven pinions (2, 3, 102, 103). - a drive means (9, 109), - a driving pinion (1, 101), said drive means being configured to drive said driving pinion in the clockwise direction and in the anti-clockwise direction, - at least one driven pinion (2, 3, 102, 103) adapted to be driven by said driving pinion (1, 101) when the driving pinion (1, 101) turns in the clockwise direction and when said driving pinion (1, 101) turns in the anti-clockwise direction, said driven pinion (2, 3, 102, 103) being configured to move into a first position under the effect of the driving pinion (1, 101) when this turns in the clockwise direction, in which first position said driven pinion (2, 3, 102, 103) actuates an actuating means (A, A) of a first horological function, and to move into a second position under the effect of the driving pinion (1, 101) when this turns in the anti-clockwise direction, in which second position said driven pinion (2, 3, 102, 103) actuates an actuating means (B, B') of a second horological function, said driven pinion (2, 3, 102, 103) not actuating the actuating means (A, A') of the first horological function when it is in its said second position and, vice versa, said driven pinion (2, 3, 102, 103) not actuating the actuating means (B, B') of the second horological function when it is in its said first position, characterized in that said mechanism for selection and actuation comprises at least two driven pinions (2, 3, 102, 103), and in that the adjusting device furthermore comprises a control mechanism adapted to selectively bring the driving pinion (1, 101) to mesh with each of said driven pinions (2, 3, 102, 103).