An analog electronic timepiece is an analog electronic watch capable of displaying a plurality of types of calendar information, and includes a first index adapted to indicate the type of the calendar information, and a second index adapted to indicate a value of the calendar information of the type indicated by the first index.

A method for updating (500) the date for a watch implemented by an updating device (100). The updating method (500) including storing in memory the current date (171) according to a perpetual calendar programmed on a time zone (175), receiving a second signal (181) before verifying a first signal (131) after having received the second signal (181). A comparison is carried out between the second signal (181) and the current date (171) in order to control the driving of at least one date-disc (120) with a drive member (160) if the second portion (127) is different from the current date (171) until the first sensor (130) detects a first portion (126) of the at least one date-disc (120).

A watch with annual calendar setting, the watch including at least one setting member configured to displace an hour hand and/or a minute hand, at least one detecting member configured to detect the date change, and at least one central processing unit configured to deduce the set date, to actuate the motor and to implement the annual calendar setting method.

A radio wave watch includes: an exterior case; a dial plate disposed within the exterior case; a substrate disposed on a rear side of the dial plate within the exterior case; a first ground layer disposed on the substrate; an antenna that has a planar emitting electrode disposed between a center of the exterior case and an inner wall surface of the exterior case and opposed to the first ground layer, a planar short-circuit part electrically connecting an end part of the emitting electrode to the first ground layer, and a connecting part connecting the emitting electrode to a receiving circuit of the substrate; and a second ground layer disposed on an opposite side to the emission electrode side across the short-circuit part on the substrate and having a width equal to or greater than a width of the short-circuit part.

An electronic watch includes a dial, an antenna, a solar panel, a circuit board, and a connection member. The antenna includes an antenna electrode. On the solar panel, a first solar cell and a second solar cell, are arranged continuously along an outer circumference of the antenna electrode, are connected in series via a third solar cell, which is not arranged along the outer circumference of the antenna electrode. The connection member is configured to connect the solar panel and the circuit board, and is arranged in a region different from a region in which the antenna is arranged when the dial is divided into two regions by a second virtual straight line, which is orthogonal to a first virtual straight line and passes through a center of the dial.

A timepiece includes a display unit including a first indicating hand and a dial so as to display a time, in which the dial has a first scale having a number for showing an absolute value of a positive numerical value within a plurality of numerical values indicated by the first indicating hand, a second scale having a number for showing an absolute value of a negative numerical value within the plurality of numerical values, a first sign for showing that the numerical value indicated by the first indicating hand is positive, and a second sign for showing that the indicated numerical value is negative.

A notification control device acquires a plan of a subject, and causes a notifier to notify current day plan content information in a first notification mode and future plan content information in a second notification mode that differs from the first notification mode. The current day plan content information is information about the acquired plan of the subject for current day or is information about the acquired plan of the subject for a certain period including the current day. The future plan content information is information about the acquired plan of the subject for the future of the certain period or is information about the acquired plan of the subject for a certain future period not including the current day.

The communication device includes a receiver, a counter, an operation member and a processor. The receiver receives an external time from an external device. The counter clocks time. The operation member receives a time correction operation to correct the time clocked by the counter. The processor corrects the time clocked by the counter to the received external time. The processor sets a frequency at which the time correction process is performed after the operation member receives the time correction operation, higher than a frequency at which the time correction process is performed before the operation member receives the time correction operation, until a predetermined time elapses. In the time correction process, when the difference between the time clocked by the counter and the external time received by the receiver is within a predetermined range, the processor corrects the time clocked by the counter to the external time.

Provided is a motor drive circuit capable of driving a stepper motor even if the load on the stepper motor varies. A motor drive circuit has a first drive circuit that outputs a first drive signal to the driver; a second drive circuit that outputs a second drive signal to the driver; a controller that controls the first drive circuit and second drive circuit. The first drive circuit is configured to output a first drive signal based on the current value of current flow of a coil of a stepper motor. The second drive circuit is configured to output multiple types of second drive signals that differ by the supply time of drive current supplied to the coil. Based on a result of driving by the first drive circuit, the controller selects the type of second drive signal the second drive circuit outputs.

A radio wave watch includes: an exterior case; a dial plate disposed within the exterior case; a substrate disposed on a rear side of the dial plate within the exterior case; a first ground layer disposed on the substrate; an antenna that has a planar emitting electrode disposed between a center of the exterior case and an inner wall surface of the exterior case and opposed to the first ground layer, a planar short-circuit part electrically connecting an end part of the emitting electrode to the first ground layer, and a connecting part connecting the emitting electrode to a receiving circuit of the substrate; and a second ground layer disposed on an opposite side to the emission electrode side across the short-circuit part on the substrate and having a width equal to or greater than a width of the short-circuit part.