A comment there mentions the specific time that causes it:

I found that the crash problem occurs when the datetime is after 2017 Dec 02, 12:15am. The problem does not happen at 12:14am, but once the time goes past 12:15am, and I do a hard reset, the problem returns.

...the real question then, is what is special about 2017-12-02 00:15 ? It's not a leap day[1], there are no leap seconds, and nothing about the epoch timestamp stands out either. I'd love to read about the cause of this bug.

[1] Leap years have caused similar problems before: http://bit-player.org/2009/the-zune-bug

The reddit thread updated to recommend against adjusting clock. It suggests to turn off local notification for app that uses repeating notification, such as daily reminder.