Method for coding and transmitting at least one solar time

A method for coding and displaying a solar time, called the initial solar time, associated with a geographical location and with a day of the year, said method comprising:

• performing by an electronic device,
• storing a plurality of types of initial solar times, including the following types:
• zenith, sunset, and sunrise;
• storing a plurality of different reference times corresponding to each type of initial solar time;
• storing a plurality of separate initial numbers of bits respectively for each type of initial solar time, wherein the initial number of bits is different between two of the types of initial solar times;
• selecting one of the types of initial solar times and selecting a reference time and the initial number of bits as a function of the type of initial solar time,
• computing a number of minutes separating said initial solar time and the reference time,
• coding said number of minutes in the initial number of bits, and
• transmitting the coded number of minutes in the initial number of bits from the electronic device to a timepiece via wireless communication,
• performing by the timepiece,
• decoding by the timepiece of the coded number of minutes and determining the solar time based on the decoded number of minutes and the initial number of bits, and
• displaying the solar time on a display of the timepiece.