Induction question?!

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I’m a little confused and I have an appointment with doctor tomorrow so I will be discussing and asking all my questions then but I thought I’d ask some of you ladies who have experienced inductions before. So my due date is this Friday but my induction date (due to GD) is set for 7:30 on Thursday morning. But I’m supposed to be at hospital Wednesday night at 10pm. So my question is, if induction is set for Thursday, why have me come to hospital Wednesday night? I’m assuming to start medication? So could I possible for into labor early after medication starts on Wednesday night before the induction happens?