[LEAPSECS] [QUAR] Bulletin C and all that

[Warner Losh]

> On Jan 25, 2015, at 2:44 PM, G Ashton <ashtongj at comcast.net> wrote:
> 
> Rob Seaman asked "Are we all agreed that it is correct to say that the
> beginning of UTC is 1972-01-01T00:00:00Z with TAI-UTC 10s at that moment?"
> 
> No, that's the beginning of making UTC track UT by inserting leap seconds.
> UTC existed before that, since around 1962, but the tracking mechanism was
> different.

I think we’d all agree if he added “with leap seconds” after the first “UTC” though.

Warner