The 5:30pm EST cutoff is very important to keep in mind when driving for DoorDash. In order for your earnings to be sent out the same night you make them, make sure to actually clock out of your dash before that cutoff time of 5:30pm EST, not just have those earnings. If you make money before that cutoff time, but you sign out of your dash after 5:30pm EST, then all of those earnings get sent out the following night. It's not about what time you start the dash - it's about what time it ends.
For example, say that on Monday, you drive from 1pm EST to 5pm EST, and you clock out of your dash at that time - all of those earnings would be sent out that same night. But, say that you start your dash at 1pm EST, and don't clock out until 7pm EST - in that case, all of those earnings would be sent out on Tuesday.