[LEAPSECS] Civil timekeeping before 1 January 1972

[Brooks Harris]

On 2015-03-09 08:40 AM, Tony Finch wrote:
> Brooks Harris <brooks at edlmax.com> wrote:
>> On 2015-03-07 03:01 PM, Steve Allen wrote:
>>
>>> I would say that the intent NTP and POSIX is to correspond to civil
>>> time in contemporary use.  Therefore, for dates before 1972-01-01
>>> NTP and POSIX are counting seconds of UT.
>> This paragraph in your email had me scratching my head a little.
>>
>> I think none of the "civil" timescales are counting in UT - they are
>> measured in SI Seconds, even when prolpetic to 1972.
>>
>> Am I missing something here?
> POSIX time is defined by a mapping from broken-down civil time labels to a
> scalar value. Currently civil time is UTC; in the past it was some other
> variant of UT.

Hi Tony,

So "UT" here is referring generally to the many variants of historical 
"UT", including today's UTC. I see. Thanks.

-Brooks

>
> Tony.