I work in computer networks.. and in the late 90’ worked in a NOC (Network Operation Control) for a global Connectivity provider for International Business
Our company decided 2 years before Y2K that "All" NOC Personnel had work that New Year's Eve "just in case" However I had put in a request for Vacation New Year 2000 three years before and had it approved... so there was a big stink but I got Y2K night off
I scheduled my Y2K vacation about 7 years in advance. (Mentioned it in my job interview) I was the only one off as well.