Take the month of your birth, then the date, and find out who will be your best friends at Hogwarts!
(I did NOT copy this from anyone.)

January: Luna Lovegood
February: Colin Creevey
March: Ronald Weasley
April: Fred Weasley
May: Neville Longbottom
June: Vincent Crabbe
July: Harry Potter
August: Draco Malfoy
September: Hermione Granger
October: Angelina Johnson
November: Lee Jordan
December: Cedric Diggory

1,3,5,7,9: Katie Bell
2,4,6,8,10: George Weasley
11,13,15,17,19: Gregory Goyle
12,14,16,18,20: Ginny Weasley
21,23,25,27,29,31: Cho Chang
22,24,26,28,30: Dean Thomas

Mine are Draco and Ginny! (I did that on purpose :P)
Comment yours!