{* *! version 1.0.0  12may2011}{...}
    {cmd:weekly(}{it:s1}{cmd:,}{it:s2}[{cmd:,}{it:Y}]{cmd:)}
{p2colset 8 22 26 2}{...}
{p2col: Domain {it:s1}:}strings{p_end}
{p2col: Domain {it:s2}:}strings {cmd:"WY"} and {cmd:"YW"}; {cmd:Y} may be
           prefixed with {it:##}{p_end}
{p2col: Domain {it:Y}:}integers 1000 to 9998 (but probably 2001 to 2099){p_end}
{p2col: Range:}{cmd:%tw} dates 0100w1 to 9999w52 (integers -96,720 to
           418,079) and {it:missing}{p_end}
{p2col: Description:}returns the {it:e_w} weekly date (weeks since
           1960w1) corresponding to {it:s1} based on {it:s2} and {it:Y};
           {it:Y} specifies {it:topyear}; see {helpb date()}.{p_end}
{p2colreset}{...}
