I am very new to Databases and are busy with my first database. However, in order for it to be practical for my use I would need to pre define inputs for certain fields. (January, Februay, March ...) 

In exsample the database I would like to create I need to input the Month in which a person's birth is when entering data from a drop-down list in the "BIRTHDAY" field.

I am using IB Expert and after reading for many hours I cannot see how to do this.