I think this is what you need. I am not sure if you can expand noweb outside a src block, so I use an inline src block to get this.
#+name: required_date
#+BEGIN_SRC text :exports none
Jan 5, 2020
#+END_SRC
In order to engage the flux capacitor, you must set the
chronometer dial to src_emacs-lisp[:noweb yes :exports results]{"<<required_date>>"} {{{results(=Jan 5\, 2020=)}}}.
#+begin_src conf :noweb yes
date: <<required_date>>
#+end_src
John
-----------------------------------
Professor John Kitchin
Doherty Hall A207F
Department of Chemical Engineering
Carnegie Mellon University
Pittsburgh, PA 15213
412-268-7803