39 with a date signal correlated to the date dial 1 so as to give a necessary signal to the second motor 37 in the months having less than 31 days the signal actuates the second motor 37 and connects the linking member 38 between the gear train 35 and the date dial 1 so that the date dial 1 is advanced actual advancement of the date dial 1 is always accomplished by means of the first motor 34 regardless of the date however the second motor 37 accelerates the occurrences of dial advancement at the ends of short months in relation to the description presented above of an embodiment of the timepiece of this invention it should be noted that the second motor 37 includes the rotor 12 shaft 13 coil 14 and stator 15 also the linking member 38 includes the date advancing pinion 11 and the gear train 35 includes the date driving wheel 7 basically in the timepiece of this invention plural mechanisms are provided for transmission of driving power to the date dial 1 from the gear train 35 the electronic circuit 33 determines which power transmitting mechanism or mechanisms is to be employed to transmit the power for driving the date dial 1 more particularly first and second driving motors 34 37 are provided the first motor 34 is employed for daily advancement of the calendar date in a manner similar to conventional calendar watches the second motor 37 is employed only for making a connection between the date.