Editing D'ni time conversion (section)

==== Algorithm 5. Cavernian Date to Gregorian Date ====

A. Calculate the Atrian ''Yahr'' (AY) for the Cavernian date, as per Algorithm 3.

B. Using real arithmetic, determine the difference (AYD) between the AY of the selected date and the AY of the base Cavernian date for the conversion (which is 1.0). This gives the elapsed time in ''yahrtee'' and fractions.

<pre>    AYD = AY - 1.0</pre>

C. Using real arithmetic, convert AYD from ''yahrtee'' to days to get the Julian Day difference (JDD). Add JDD to the Julian Day number of the base Gregorian date (which is 727249.704166666) to get the Julian Day number (JD) of the Cavernian date.

<pre>    JDD = AYD * 1.25945582758621
    JD = JDD + 727249.704166666</pre>

D. Convert the calculated Julian Day to a Gregorian date, as per Algorithm 2.