FW: correction for tzdata/leapseconds

Markus Kuhn Markus.Kuhn at cl.cam.ac.uk
Thu Jul 22 14:05:13 UTC 1999

"Olson, Arthur David (NCI)" wrote on 1999-07-22 13:43 UTC:
> From:	Michael Deckers [SMTP:Michael.Deckers at mch6.siemens.de]
> Sent:	Thursday, July 22, 1999 6:29 AM
> To:	tz at elsie.nci.nih.gov
> Subject:	correction for tzdata/leapseconds
>    Just a quibble in the file "@(#)leapseconds	7.11" in 
>    ftp://elsie.nci.nih.gov/pub/tzdata1999d.tar.gz:
> # The International Earth Rotation Service periodically uses leap seconds
> # to keep UTC to within 0.9 s of TAI (atomic time); see
>                                  *****************
>    This becomes correct only with UT1 in place of TAI.

I agree. The string "TAI (atomic time)" should definitely be replaced by
something like "UT1 (astronomical earth time, corrected for known
periodic fluctuations)".

See also


for the official definition of UTC, but please don't include these URLs
(only temporarily available).


Markus G. Kuhn, Computer Laboratory, University of Cambridge, UK
Email: mkuhn at acm.org,  WWW: <http://www.cl.cam.ac.uk/~mgk25/>

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