Though actually, it's already happened. Although it is 21:37 PST here on the West Coast, it is 05:37 UTC. So the leap second event already happened over 5 and a half hours ago. Sorry for not being more timely.
I was going to ask which time zone got the honors but then I kept reading. I guess my "atomic watch" will adjust without me noticing.
Happy New Year, EvC! (well, it could happen in a parallel universe, (I'm drinking my annual single malt toast to my dad)).
What if Eleanor Roosevelt had wings? -- Monty Python
One important characteristic of a theory is that is has survived repeated attempts to falsify it. Contrary to your understanding, all available evidence confirms it. --Subbie
If evolution is shown to be false, it will be at the hands of things that are true, not made up. --percy