Instruction:
What is my Chinese Zodiac sign (animal)?

Response:
There are 12 Zodiac animals: rat, ox, tiger, rabbit, dragon, snake, horse, goat, monkey, rooster, dog, and boar. To find it, you can look up the lunar calendar. But the following way is a quick and traditional Chinese way to find it.  

Calculate the remainder of (Year of birth - 1900) / 12, and check the remainder with date of birth:

Date of birth is before January 21: 
The remainder = 0, Boar
The remainder = 1, Rat
The remainder = 2, Ox
The remainder = 3, Tiger
The remainder = 4, Rabbit
The remainder = 5, Dragon
The remainder = 6, Snake
The remainder = 7, Horse
The remainder = 8, Goat
The remainder = 9, Monkey
The remainder = 10, Rooster
The remainder = 11, Dog

Date of birth is after February 20: 
The remainder = 0, Rat
The remainder = 1, Ox
The remainder = 2, Tiger
The remainder = 3, Rabbit
The remainder = 4, Dragon
The remainder = 5, Snake
The remainder = 6, Horse
The remainder = 7, Goat
The remainder = 8, Monkey
The remainder = 9, Rooster
The remainder = 10, Dog
The remainder = 11, Boar

For those born between January 21 and February 20, the beginning of the Lunar New Year usually, please look up the lunar calendar which will provide the details.