5:00 am Pacific time. 8:00 am Eastern time
Correct and the OP is right there will be huge demand and very low supply. There are Major tips to secure a Pre-Order which will last 2 minutes before they sell out Nationally.
#1. LogIn with Your Apple ID
#2. Use your Apple Pay and Apple Card if you have one.
#3. Make a purchase today just buy a cellphone case anything just so everything is working you don’t want any surprises on the Pre-order day.
#4. Call and advise your Bank that you will be making a $1099+ Purchase on April 30 sometimes Fraud Protection kicks in and creates a mess
#5. Add another item to your cart in Pre-Order day, a charging cable or anything Apple gives priority to Carts with multiple items. (You can return the filler item later)
#6. You will NOT be able to buy a 12.9” iPad Pro XDR at the Apple store.
#7. Use your iPhone or iPad to make your purchase Apple servers give prioity to iOS devices.
#8. Do NOT go Back and Change your mind. Servers will be hit hard and you will lose everything You get 1 Shot to buy and checkout.
#9. Pay full Price I know there’s a Trade In Option that’s a 100% sure way you won’t check out in time sell your Trade in by yourself.
#10. Use the Apple Store App. Make sure your Text message number is up to Date they may text your to verify the purchased.