Scout and Jem were talking about there birthdays adn asked when Cal's was.  She said she didn't have a real one, but she made her's on Christmas because it was easier to remember.  She also said she doesn't really know how old she is.  she said this was very common for colored people.  Again, another thing I have never thought about but are very normal for other people.  It is so strange she doesn't know her age of birthday.