Classic If I buy epic edition SL, will the 30 days gametime be applied on the 26th?

I wanna pre-order, but I dont wanna start WoW back up until the SL release, been gone a long while, but also wouldnt wanna waste the 30 days free time..(no i can't just play it not, work is tooo heavy atm XD)lmk please! much appreciated. via /r/wow https://ift.tt/3jiK7C5