Please note that Chinese zodiac follows the (lunisolar) Chinese calendar, the switch over date is the Chinese New Year, not January 1 as in the Gregorian calendar. Therefore, a person who was born in January or early February has the sign of the previous year. For example, although year 2008 was called the year of the rat, anyone born from Jan 1 to Feb 6, 2008 was in fact born in the Year of the Pig (the sign of the previous year), because the 2008 Year of the rat did not begin until Feb 7, 2008. For this reason, many online sign calculators (and Chinese restaurant place mats) will give a person the wrong sign if he/she was born in January or early February.
The following chinese zodiac sign calculator will take into account your brithday and chinese calendar.