We seem to have been here before, many, indeed too many times. There are arguments for displaying or printing local times; there may be arguments for scheduling things manually using local times. In the United States, alone in the world, there may perhaps be some justification for providing hoi polloi with am|m|pm, twelve-hour-clock values in such situations.
There is no intellectually respectable argument for running an operating system on anything but UTC. When STCKE values and their derivatives are UTC-based these pseudo-problems, those of missing and duplicate timestamp values, do not arise. I am not so great an admirer of Ludwig Wittgenstein as some professional philosophers whom I respect, but he did make some points memorably, and among them was that About things we know not, we ought to be silent. John Gilmore, Ashland, MA 01721 - USA
