Years are also called years. In ancient times, the year was marked by the year star (Jupiter). The ancients divided the equatorial part of the sky into 12 equal parts, and each equal part was marked by a certain star. Jupiter moves exactly one quarter every year, one week every 12 years. The number of years the year star (Jupiter) is worth and its stems and branches are called years.
The number of years used in calligraphy signatures means that the writing was written in a certain year.