where did the time go ?

I just finished booking an appointment for Michael to have his senior photographs taken.(Yes I am a bit early but booking today is saving me 60% off his sitting fee and $75 off his pictures plus 40 free wallet size pictures) Though the appointment isn't for three months yet, it still seems so early to be doing so. Not early like in having them taken months before( in order to be in the yearbook they must be taken by September) but like How can he already be a junior, just yesterday he was in preschool, wasn't he?