Timepiece (2; 112; 132; 154; 170) comprising: - a display displaying an actual time, - a mechanical movement (4; 4A; 92) comprising a mechanism for driving the display and a mechanical resonator (14; 14A) which is coupled to the drive mechanism such that the oscillation thereof times the running of this drive mechanism, - a device for correcting the actual time indicated by the display; the device for correcting the actual time displayed being formed by: - a receiver unit (30, 30A; 30B; 204) for receiving an external correction signal (S Ext) for correcting the actual time displayed, this external correction signal comprising an information relative to a correction of said actual time displayed, - an electronic control unit (28, 28A; 28B; 196) arranged to be able to process said information contained in the external correction signal such as to determine a correction required for the actual time displayed; characterised in that the device for correcting the actual time displayed comprises a braking device (22; 22A; 22A, 106; 22B, 114; 24C, 26C; 22C; 174) for braking the mechanical resonator; in that the electronic control unit is arranged to be able to control the braking device as a function of at least the correction required; and in that the device for correcting the actual time is arranged such that, when the external correction signal received by the timepiece requires the actual time displayed to be corrected, the braking device can act on the mechanical resonator during a correction period, to vary the running of the drive mechanism, so as to carry out at least the major part, preferably substantially all of the required correction. - a display displaying an actual time, - a mechanical movement (4; 4A; 92) comprising a mechanism for driving the display and a mechanical resonator (14; 14A) which is coupled to the drive mechanism such that the oscillation thereof times the running of this drive mechanism, - a device for correcting the actual time indicated by the display; the device for correcting the actual time displayed being formed by: - a receiver unit (30, 30A; 30B; 204) for receiving an external correction signal (S Ext) for correcting the actual time displayed, this external correction signal comprising an information relative to a correction of said actual time displayed, - an electronic control unit (28, 28A; 28B; 196) arranged to be able to process said information contained in the external correction signal such as to determine a correction required for the actual time displayed; - a receiver unit (30, 30A; 30B; 204) for receiving an external correction signal (S Ext) for correcting the actual time displayed, this external correction signal comprising an information relative to a correction of said actual time displayed, - an electronic control unit (28, 28A; 28B; 196) arranged to be able to process said information contained in the external correction signal such as to determine a correction required for the actual time displayed; characterised in that the device for correcting the actual time displayed comprises a braking device (22; 22A; 22A, 106; 22B, 114; 24C, 26C; 22C; 174) for braking the mechanical resonator; in that the electronic control unit is arranged to be able to control the braking device as a function of at least the correction required; and in that the device for correcting the actual time is arranged such that, when the external correction signal received by the timepiece requires the actual time displayed to be corrected, the braking device can act on the mechanical resonator during a correction period, to vary the running of the drive mechanism, so as to carry out at least the major part, preferably substantially all of the required correction.