Calculate days between two Dates in Java 8

I know there are lots of questions on SO about how to get Dates in Java, but I want an example using new Java 8 Date API. I also know about the JodaTime library, but I want a method without relying on external libraries.

The function needs to be compliant with these restrictions:

1. Prevent errors from date savetime
2. Inputs are two Date objects (without time, I know about LocalDateTime, but I need to do this with Date instances)