\SetTxt{September Quote}{%
silent new lake\\
let the frog jump\\
not even a sound

\textit{-- Ryokan}%
}

\newcommand\SeptMarks{%
  if (equals=2018-09-21)
    [day text={\dejaVuSans\char"263C}];% U+263C white sun with rays
}

\SetTxt{Sept Events}{%
{\dejaVuSans\char"263C} Sept 21: September 21
}