[HECnet] US DST

The recent post about multi-threaded NNTP for VMS (whaaay cool) jogged my memory about something I had been wondering about.? This morning, a large number of clocks got switched ahead an hour in the United States.? Tops-20 did it 'relatively flawlessly' as it has done so since the early 1980's.? Back then, a lot of systems didn't.? None of our IBM systems did. A lot of that has changed nowadays with NTP clients; even if the base operating system doesn't support time change, an NTP client can address that.? So all my systems advanced appropriately, as did an old radio clock.? I'm not sure how *nix does it, but I don't remember Ultrix having the code on our 8650 (or 8700). Tops-20 will do the change whether or not a client exists as the code is in the monitor. At the time (1980's), I don't believe that VMS had internal code to do the time change and NTP did not exist as such (some network time services existed, but I don't remember whether there was a generally available VMS TCP/IP package; we didn't have it).? I would assume that this is handled now.? I hesitate to ask about RSX and RSTS, but I would assume that the C compiler for RSX (with Johnny's TCP/IP interface) could support an NTP port.? Anyway, the question is: how does VMS handle the time change? By 'relatively flawlessly', I mean Galaxy.? If you submit jobs with an /AFTER: switch, but use an elapsed time, you can get the wrong start time.? For example, in a daily batch job to do incremental saves, TODAY+2:00:00 means tomorrow morning at 2:00:00 AM, assuming the current job was started at 2:00:00.? However today, the job? started at 3:00:00 AM.? No big deal. However, this used to seriously mess up our operations, who started shift expecting requests for tape mounts. ? I looked at the issue awhile back in the 80's, but realized that the problem wasn't in Quasar because it is only dealing with internal date format.? The issue had to be fixed by putting some logic into the Exec to differentiate between a specified time and a calculated time.? As it wasn't immediately straightforward, I never got to it.? Maybe one of these days...