The sixty day pillars (Liu Shi Jia Zi, 六十甲子)
Your day pillar is the pair of characters for the day you were born: an element on top — your day master — and an animal beneath it. Ten stems and twelve branches pair up into sixty, and the cycle repeats every sixty days. Each page has what the classic San Ming Tong Hui says the pillar is, what its animal holds, the named day patterns it belongs to, and famous people born on it.