My "Electronic" post mark is 12:05am 04/19/17 CST, and I have a refund and do not owe any taxes, will there be any sort of penalty or what course of action will happen?

When I finalized my e-filing, it was 5 minutes past midnight and I'm worried what the consequences will be? No taxes owed and I do have a refund. What will happen since I was 5 minutes late?