Do I have to use my Birthday "Fast Pass" on my birthday?

[pugslave]

Hi! We will be at WDW on my birthday, but I'm going to be at MK on the actual date, but would rather use my birthday Fass Pass at DHS (Toy Story Mania most especially!). Do you have to use the FP on the actual date, or is there an expiration date. Thanks!

[Seasonscraps]

I am pretty sure anything related to the birthday promotion needs to be used on your birthday.

[ibelieveindisneymagic]

The birthday FP has to be used on the actual day of your birthday.