Known as Sheng Xiao (生肖), the Chinese Zodiac, is based on a twelve-year cycle, each year in that cycle related to an animal sign. These signs are the rat, ox, tiger, rabbit, dragon, snake, horse, sheep, monkey, rooster, dog and pig.
Sheng Xiao is calculated according to the Chinese lunar calendar. You can use the calculator to search for your Chinese zodiac animal sign. Select your Gregorian date of birth, and you'll reveal your date of birth according to the lunar calendar, together with your zodiac sign.