Religion
Chinese New Years
There are 12 of them and I have done them starting from 2000 to 2011. So whatever year you want, you just add or subtract 12 until you get to your year. For example, I was born in 1965 + 12 + 12 + 12 = 2001 so I am a snake, which is about right. It begins in February so if you are born in January then knock a year off.
