1. Christmas 2009, goes by three month rule
2. CS Birthday 2010, three month rule
3. March 2010, three month rule
The three month rule is a rule of thumb that is often used in trading to determine whether or not two pets can be fairly traded for each other.
Generally, pets that were released within three months of each other (ex. July-September) and have the same rarity are considered a fair trade for one another.

























