This code works, but it seems like there should be a simplier way.
//Reformat MMM/YYYY (create new columns, create new Date, delete MMM/YYYY)
New Column( "Month",
Numeric,
"Nominal",
Format( "Best", 9 ),
Formula( Num( Substr( :Name( "MMM/YYYY" ), 2, 2 ) ) )
);
New Column( "Year",
Numeric,
"Nominal",
Format( "Best", 9 ),
Formula( Num( Substr( :Name( "MMM/YYYY" ), 5, 8 ) ) )
);
New Column( "Date",
Numeric,
"Continuous",
Format( "m/y", 12 ),
Input Format( "m/y" ),
Formula( Date MDY( :Month, 1, :Year ) )
);
//Moves new column to follow Product Line
:Date << Set Selected( 1 );
dt << Move Selected Column( after( "Product Line" ) );
:Date << Set Selected( 0 );