ttj - Tom Jones

Crossing the Pacific westwards, the ship's time gets set back one hour at a time.  The ship's management arranges it so that at land stops, it is synchronised with the location.  Changes between one stop and the next are somewhat arbitrary, but the idea should be to keep changes smooth and have dawn and dusk at sensible wall times. I set around 5 clocks at each change. The Casio F-91W is the easiest.  I set the hour back using the three buttons on the watch.  The only annoyance is that I have to cycle +23 hours, as one can not decrement the hour directly.  It's not that annoying, and one knows it's going to work. For the Debian (Linux) laptop, I change the /etc/localtime symlink to point to location in /usr/share/zoneinfo/*/*, such as /usr/share/zoneinfo/America/Vancouver.  This is fine when there is a well-known city to select.  It sometimes involves research and experimentation to choose one with the correct (current) offset.  Once the symlink c...