Re: [art] Predictable Internet Time

[Tony Finch <[e-mail]>]

Philip Homburg <[e-mail]> wrote:
>
> A few random comments.

Good comments :-)

> - There are two types of solar time. The actual solar time where the sun is
> at the highest point at noon, and mean solar time.

The usual term for the former is "apparent solar time". If you are talking
about both then it's worth saying the difference between apparent and mean
solar time is called the equation of time.

> - One thing I'd like to add is 'uptime' or more general, monotonic time.

An interesting discussion re. compatible APIs for elapsed time:
https://github.com/golang/proposal/blob/master/design/12914-monotonic.md

> - Another thing worth mentioning explictly is that for the distant future,
> there is no way to convert between TAI and UTC because future leapsecond are
> not yet defined. So TAI is good for computing intervals, except if it involves
> timestamps more than a few months in the future.

I think "distant future" isn't a very good description for "a few months" :-)

The actual horizon is about 5 - 11 months, just before and just after
bulletin C is published in January or July.

Tony.
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