[Info-vax] bizarre problem with system time (not DST)

[David Froble]

Stephen Hoffman wrote:
> On 2015-03-29 03:48:41 +0000, David Froble said:
> 
>> Stephen Hoffman wrote:
>>>
>>> OpenVMS V7.3 and later have the automatic change mechanism.   See the 
>>> AUTO_DLIGHT_SAV system parameter for details.
>>> <http://h30266.www3.hp.com/odl/vax/opsys/vmsos73/vmsos73/6017/6017pro_017.html> 
>>>
>>> There have been timezone patch kits, and there probably should be 
>>> more of them issued as the definitions change fairly often.
>>>
>>
>> This is one area where I think weendoze does it much better.
> 
> Microsoft Windows has the same issues with its use of local time as its 
> time base, as does OpenVMS.  Unix uses UTC as its time base, and got 
> this design right.  OpenVMS and Windows did not.

Different topic.  I was discussing how to modify the DST start and end 
dates.

>> MicroSoft has a program, Windows Time Zone Editor, that allows you to 
>> specify the current DST start and end.  Much better than having to 
>> apply a patch.
> 
> OpenVMS has that, too.  <http://labs.hoffmanlabs.com/node/148>

That just makes my point.  Lots of hoops to jump through, and I found no 
documentation on ZIC.

The weendoze utility allows you to just specify:

"First Sunday in March"  and "2:00 AM"
"First Sunday in November" and "2:00 AM"

Or whatever the date and time is.

>> Doesn't hurt to steal good ideas from others ....
> 
> Better still, improve on the existing good ideas, and regardless of the 
> source.
> 
> 

Yeah ..