[Info-vax] DTSS and NTP

[Stephen Hoffman]

On 2023-06-05 20:17:08 +0000, Chris Townley said:

> However I presume I will miss the automatic changes at BST begin/end, 
> unless NTP can be made to do that.

DTSS (DECdtss) timekeeping—including TDF and TZ and DST support and the 
rest—was integrated later OpenVMS V7 and that was also then integrated 
with whatever version of TCP/IP Services NTP was current back then, the 
DTSS timekeeping RTL was also integrated but first documented with 
OpenVMS around V8.2, and it's all managed with UTC$TIME_SETUP.COM (and 
either NTP or DTSS giblets as needed), and the related database and 
tooling is based on the IANA / Eggert / Olson definitions. This is all 
far enough back that it's in the OpenVMS FAQ, too.




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