What time zone are you analyzing from?
Q 136 for example
<time class="time" datetime="2017-11-12T04:31:41.000Z" title="Local: Nov 11 2017 20:31:41">Nov 11 2017 23:31:41 (EST)</time>
4:31
I don't have Q in a db, so having to parse HTML is not fun. You might have something if you start from a different time zone.