this complaint is almost as old as the Java language. you should use Jodatime if you can't upgrade to Java 8+ yet -- see https://www.joda.org/joda-time/
It also reminds of a quirk in DB2. I'm not sure if this is still the case, but in versions 6 and 7 circa 2003, '2019-06-24T24:00:00' and '2019-06-25T00:00:00' would never compare equal, yet they are the exact same point in time, excepting some rare leap seconds.
Edit: spelling