In Chinese astrology each individual personality is associated with an animal sign that represents it. It is a common misconception that there are only the singular animals assigned by year. Many western descriptions of Chinese astrology descriptions draw solely on this system. In fact, there are also animal signs assigned by month and hours of the day.
The animal signs assigned by year represent what others perceive you as being or how you present yourself. The full 60 year cycle is a combination of the 12 animals with each of five possible elements, which distinctively vary the base animal's personality (12 x 5 = 60). The inner animal speaks directly to what motivates a person and is assigned by the month of birth. Since this dictates your love life and inner persona it is critical to a proper understanding of your compatibility with other signs. The secret animal is assigned by the hour of birth and so it is important to know the exact time of birth to determine it correctly. It is your own true sign which your personality is based on. It is important to compensate for daylight saving time or any clock adjustment performed by your country in determining this sign, as it is mapped according to the sun's location and not the local time.