Effective today, your door access codes will change from a four digit code to an eight digit code. Your old door code will have four numbers added to it. It will be your old code PLUS your two digit birth month and two digit birthday.
Directly from the IT Guys Email, please see his explanation below:
Please be sure it’s relayed to drivers that the door codes will change to 8 digit today at noon. The codes will be their old 4 digit code PLUS their two digit birth month and two digit birthday.
i.e., if their code was 1234 and they were born on January 2, then their code would now be 12340102