timezone overlap

DatesOverlap.java

import java.time.ZonedDateTime;
import static java.lang.System.out;

class Program {

    public static void main(String[] args) {

        ZonedDateTime thisStart = ZonedDateTime.now().plusHours(-4);
        ZonedDateTime thisEnd = ZonedDateTime.now().plusHours(-2);

        ZonedDateTime otherStart = ZonedDateTime.now().plusHours(-3);
        ZonedDateTime otherEnd = ZonedDateTime.now();

        out.print(thisStart + " ");
        out.println(thisEnd);
        out.print(otherStart + " ");
        out.println(otherEnd);

        if (thisStart.isBefore(otherEnd) && otherStart.isBefore(thisEnd)) {
            out.println("Overlapping ...");
        }
    }
}