The date that registration begins is determined by the settings you have chosen in your Profile.  Registration will not begin until the date you selected in your profile.  Be careful about changing this date to an earlier time as we may not have your form done and completely tested.  We also remove all of the test data from the database right before it goes live to the students.  If you change the date we might not get the database dumped in time.  You can always make the date later without having any negative repercussions.