The idea that if being dark at 12pm in 20k years will bother anyone is absurd. The shift will happen so slowly that the only people who will even realize it happened are historians and history buffs.
Really the idea that there will enough civilizational continuity that our current timekeeping infrastructure and systems will continue unbroken for that long is insane.
Really the idea that there will enough civilizational continuity that our current timekeeping infrastructure and systems will continue unbroken for that long is insane.