date in variables comparison issue

Not quite sure why this is not working. If I comment out one of the comparison it works fine. Just doesn't work when both dates are compared at the same time. Is this a variable issue? Any ideas?

Code (text):

set @vfutureDate = (select date_add(curdate(), interval 30 day));

set @vmonth = extract(month from @vfutureDate);

set @vday = extract(day from @vfutureDate);

select * from tbl

where

monthDt = @vmonth

and

dayDt <= @vday;

See original post by lektrikpuke