Date fields / query fields / lists

I am attempting to create a list of all the members with a birthday in the current month.

my thoughts on how to achieve this are

a. create a Query Field that would give me the members birth month from the date of birth that they input.
b. create a list that will compare the above field with the current month

is there anywhere that I can find a "Dummies Guide" on this i.e how to use the only one part of the date (day, month or year) only from a date field and how to get the current date / month etc.

or is there a better / simpler way of achieving this?

A query field is not stored in the database. You can not filter a userlist on a query field. The best way to do this is to have a regular date field where they supply their birthdate then in your userlist use Advanced filtering, which lets you add custom SQL directly to the WHERE statement of the userlist query. The below should work.

Filters: Advanced: