Its going to be extremely hard to update computers and other devices for this
Not really
hard - just tedious and time consuming.
We should also move to Base 10 Time while we are changing...
100 seconds in a minute
100 minutes in an hour
10 hours in a day
Just 13,600 bonus seconds

Let's include the US in the change this time.
Unlikely, there is also internet time (beat time) where the day is divided into 1000 "beats" and allover the world its the same time. We meet @345 beats, @500 beats is noon
https://www.timeanddate.com/time/internettime.htmlBlockchain time, who knows, maybe on day.