Weekend filter for Java 8 LocalDateTime

Question

I want to write a boolean valued function which returns true if the given LocalDateTime falls between two specific points in time, false otherwise.

Specific

Answer 1

How would you expect such a library to work? You would still need to tell it when your weekend begins and ends and it would end up being not much shorter than the simple

boolean isWeekend(LocalDateTime dt) {
    switch(dt.getDayOfWeek()) {
        case FRIDAY:
            return dt.getHour() >= ...;
        case SATURDAY:
            return true;
        case SUNDAY:
            return dt.getHour() < ...;
        default:
            return false;
    }
}