[LEAPSECS] alternative to smearing

[John Sauter]

An alternative to smearing is to persuade applications to deal with UTC
and the Gregorian calendar as it is, with its variable-length months
and minutes.  In support of that alternative, I am making available
some subroutines which applications can use to deal with time.  This is
an update to the preliminary code that I previously posted to the leap
seconds mailing list.  The code can be extracted from the PDF file at
this URL:

<https://commons.wikimedia.org/wiki/File:Avoid_Using_POSIX_time_t_for_T
elling_Time.pdf>

The subroutines use a table of changes in Delta T to track leap
seconds.  Most of the table in these subroutines was computed based on
the latest research into historical values of Delta T from F. R.
Stephenson, L. V. Morrison and C. Y. Hohenkerk in this paper:

<http://rspa.royalsocietypublishing.org/content/472/2196/20160404>

The computations are described in an update of my earlier paper on this
subject, at this URL:

<https://commons.wikimedia.org/wiki/File:Extending_Coordinated_Universa
l_Time_to_Dates_Before_1972.pdf>

I would be glad for any comments anyone might have on my work.
    John Sauter (John_Sauter at systemeyescomputerstore.com)
-- 
PGP fingerprint E24A D25B E5FE 4914 A603  49EC 7030 3EA1 9A0B 511E
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