The Day & Night watch will tell you what time of the day it is and how close you are to sunset and sunrise. You could probably learn approximately what time it is by comparing it to a normal time-teller but the point is to let go and accept life a bit less exact.
Since sunset and sunrise depends on location and time of the year the movement would require these icons to be adjustable to divide the 24-hour cycle between day and night.
The Work & Play watch. If you have a job with fixed routines this watch might suit you. If you have a tendency to bring work home you need this watch. It counts down how much time you’ve got left to work, and then swaps to Play-mode which counts down the time you’ve got to play before Work-mode kicks in again.