On Thursday, August 9, 2018 at 3:39:05 PM UTC-6, Gerald Kelleher wrote:

The entire history of timekeeping can be constructed from my postings to this newsgroup

You know, the Greenwich Observatory has a _meridian circle_. The reason why that
is useful for purposes relating to timekeeping is, of course, the reason why your
posts here are based on a mistaken premise.

John Savard