{* *! version 1.0.0  12may2011}{...}
    {cmd:day(}{it:e_d}{cmd:)}
{p2colset 8 22 26 2}{...}
{p2col: Domain {it:e_d}:}{cmd:%td} dates 01jan0100 to 31dec9999
           (integers -679,350 to 2,936,549){p_end}
{p2col: Range:}integers 1 to 31 and {it:missing}{p_end}
{p2col: Description:}returns the numeric day of the month corresponding to
           {it:e_d}.{p_end}
{p2colreset}{...}
