Date of Birth

Hi, I am from Lebanon, i will take my first SAT test this Saturday. Unfortunately, i discovered yesterday that i have written my date of birth wrongly. the wrong one ( on the admission ticket ) is : MM/31/YYYY the correct one is : MM/30/YYYY So my mistake is only the day - actually i always thought that my birthday is on 31 :)

will that make any problem in Saturday ?

Note : I sent an email to college board, but the reply was that they will answer me within 3 days. Thanks in advance.

Any mistakes in official documents can cause some problems. Therefore, it is best to address this issue immediately.