DOM
[
VLIB_MONTH:z {< choice $z>}
]


VLIB_MONTH [
  january {return("january")}
  february {return("february")}
  march {return("march")}
  april {return("april")}
  may {return("may")}
  june {return("june")}
  july {return("july")}
  august {return("august")}
  september {return("september")}
  october {return("october")}
  november {return("november")}
  december {return("december")}
]