Electronic timepiece and information acquisition method

An information acquisition method for acquiring predicted positional information in an electronic timepiece, the electronic timepiece including a radio wave receiver which receives radio waves from a positioning satellite, a communicator which performs communication with an external device, and a storage which stores first predicted positional information of the positioning satellite acquired from a source other than the positioning satellite, and the method comprising:

• updating the first predicted positional information stored in the storage by causing the communicator to acquire second predicted positional information from the external device before an end of an effective period of the stored first predicted positional information;
• wherein:
• the second predicted positional information acquired from the external device is last predicted positional information acquired by the external device among predicted positional information acquired by the external device a plurality of times within the effective period, and
• no predicted positional information is acquired except the second predicted positional information that is the last predicted positional information acquired by the external device among predicted positional information acquired by the external device a plurality of times within the effective period.