[Info-vax] DTSS to NTP

[Richard B. Gilbert]

Bob Koehler wrote:
> In article <hccu3s$scl$1 at pcls6.std.com>, moroney at world.std.spaamtrap.com (Michael Moroney) writes:
>> I'm working with a site that has software that doesn't tolerate time
>> changes well.  Before this summer, they'd run with parameter
>> AUTO_DLIGHT_SAV = 0, and when DST started or ended, they'd change the time
>> manually when convenient for them and restart the software.  Some time
>> over the summer they started using NTP to synch with an external source.
>> I see that NTP itself shouldn't mess them up, but I foresee them changing
>> the time and then having NTP try to set the time back.  They'll have to
>> stop NTP, change the time, change the time zone for NTP and restart it,
>> from what I see.  Did I miss anything?
> 
>    You should be able to setup NTP such that it doesn't do daylight
>    savings time.  But in order to do daylight savings time on your own
>    schedule you'll have to modify NTP's settings to convince it to give
>    you what you want when you want it.
> 

NTP knows nothing of "daylight savings" time.  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.  ISTR that even Unix has provisions for 
keeping UTC and displaying the local time of your choice.  Searching for 
  "TZ" might turn something up.

For VMS, look in SYS$MANAGER.