Back in the day – which in this case means last century – while serving aboard nuclear submarines, I first encountered life in two different chronological constructs. While the world continued to operate on a 24-hours cycle, life aboard the submarine was constructed around an 18-hour day based on standing “watch” on the rotation of three shifts of 6 hours each. “What time is it?” was no longer a question of UTC London, Washington DC, Honolulu,or the timezone we happened to be operating in, it was “how much time” was left in the current watch cycle or until you had to report for the next. Continue reading →