Astrological sign operate on cycles of years, lunar months, and two-hour periods of the day (also known as "shichen"). A particular feature of the Chinese zodiac is its operation in a 60-year cycle in combination with the Five Phases of Chinese astrology (Wood, Fire, Metal, Water and Earth). Nevertheless, some researches say that there is an obvious relationship between the Chinese 12-year cycle and zodiac constellations: each year of the cycle corresponds to a certain disposal of Jupiter. For example, in the year of Snake Jupiter is in the Sign of Gemini, in the year of Horse Jupiter is in the Sign
Pig (zodiac) yin, and thus only the negative aspects of the elements can be attached to them, thus only 5 kinds of Pigs are found in the zodiac. They are the following: People born within these date ranges can be said to have been born in the "Year of the Pig", while also bearing the following elemental sign: Since the Chinese zodiac follows the Lunar calendar, it also does not coincide with the Gregorian calendar years or months. Thus, a person born on 9 February 1899 still belongs to the preceding zodiac (i.e. the Dog) while those born on 31 January 1900