Abstract: A timepiece apparatus has a time base unit and a wristwatch co-operable with the time base unit for time adjustment. The time base unit includes a microcontroller unit (MCU) for operation and time keeping and a transmitter for transmitting a wireless signal indicative of the current time. The wristwatch includes an MCU for operation and time keeping, a display, and a receiver for receiving the wireless signal, whereupon the MCU will automatically, without the use of any key or button, adjust the time displayed based on the wireless signal to the current time. A detector preferably detects proximal placement of the wristwatch relative to the time base unit, before the transmitter and the receiver are activated.