A Tropical Year is defined as the time it takes for the earth to complete one orbit around the sun, based on the position of the solstices and equinoxes. Other synonyms for the Tropical Year include the Solar Year, the Annum Tropicum, or the Analemma Year. These terms refer to the same phenomenon, and are used interchangeably depending on the context or geographic region. The Tropical Year is a fundamental concept used in astronomy, and it serves as the basis for the Gregorian calendar used worldwide as well as agricultural practices in different parts of the world.