What was Y2K?
It was a computer bug that scared everyone back in 1999 to around February of 2000. Fax machines, payphones, flights, paying machines, computers, and other tech werent working all cuz of the stupid y2k bug.
What caused this bug?
It's probably cuz the date and time were only shown in 2 letters for the year, instead of 4! this caused the dates to show January 1st, 1900 instead of January 1st, 2000.
Will this happen again?
Most likely wont, but I think it wont happen again until around the year 10000!