Payouts for credit card payments are made daily and contain payments processed two business days prior (this is how long it takes for your pending account balance to become available on this schedule). For example, payments received on a Tuesday are paid out by Thursday, and payments received on a Friday are paid out by Tuesday.
Payouts for ACH payments are paid out after the transaction has cleared (after 3-5 business days).
Stripe operates off of the UTC Time Zone:
All payments and payouts are processed according to UTC time. As a result, the processed date may not be the same as your local time zone.
So the payments need to be made by midnight UTC (5/6pm ET - 2/3pm PT) to be rolled into the payout.