xkcd #3232: Countdown Standard
Title text:
Anyone who is caught counting 'three ... two ... one ... zero ... GO!' will be punished with a lifetime of eating only ISO standard food samples.
Transcript:
Transcript will show once it’s been added to explainxkcd.com
Source: https://xkcd.com/3232/
Check the podcast episode “A Problem Squared - 121 = Bi-annuals and Diagonals”. In it, Matt and Beck discuss what these terms even mean, and propose a solution.