[Info-vax] DTSS to NTP

[Bob Koehler]

In article <At2dnSocGdjqonbXnZ2dnUVZ_j2dnZ2d at giganews.com>, "Richard B. Gilbert" <rgilbert88 at comcast.net> writes:

> NTP knows nothing of "daylight savings" time.

   The NTP protocol may know only UTC, but translation to/from local
   time depends on the OS.  In order to deal with VMS, for example,
   an NTP setup does need to know what the local time rules are.  (See
   explanation below.)

>  It deals in UTC (what 
> used to be called (Greenwich or GMT) ONLY.  Your operating system may 
> have provision for displaying local time and/or standard and daylight 
> saving time!  Windows does.  So does VMS in recent versions; say the 
> last ten or fifteen years.

   For the last ten or fifteen years, VMS has continued to store and
   process time as local time, but the C RTL has had the ability to
   translate to UTC and other time standards.  This gets the same 
   results as other OS, but is a different implementation.  And NTP 
   has been affected.