Due date so close to oldest son bday

Sade • Mother of a toddler (👦🏽💙) n on May24th (👶🏽💚) ill be a mommy of 2.
My first son was due May 24th 2013 he came 2 days early on the 22nd. 
My second son is due on May 24th 2016 but something tells me I'm going to go in early n I don't want to go in early but in case he does come early I planned a Zoo trip for my son 3rd bday a week n a few days before hope that's enough time..I want things to go as planned but we all know that never happens