\begin{genealogypicture}[timeflow=left,
processing=database,
database format=full marriage below,
date format=d/m/yyyy,
tcbset={male/.style={colframe=blue,colback=blue!5},
female/.style={colframe=red,colback=red!5}},
box={fit basedim=7pt,boxsep=2pt,segmentation style=solid,
halign=flush left,before upper=\parskip1pt,
\gtrDBsex,drop fuzzy shadow,
if image defined={add to width=25mm,right=25mm,
underlay={\begin{tcbclipinterior}\path[fill overzoom image=\gtrDBimage]
([xshift=-24mm]interior.south east) rectangle (interior.north east);
\end{tcbclipinterior}},
}{},
},
edges=rounded,
]
sandclock
{
child{
p{male,
name=Willy Otto Alfred Scholz,
birth={1889-02-11}{Moabit, Berlin},
marriage={1910-11-30}{Heilandkirche, Berlin},
death+={1914-08-23}{Vedin vor Namur, Belgien}{killed},
comment={Reservist im Infanterie-Regiment No. 93}
}
g{female,
name={\bf Therese Margarete Agnes Emma Hille},
birth={1887-09-10}{Dalldorf},
marriage={1910-11-30}{Heilandkirche, Berlin},
%marriage={1920-04-30}{Berlin},
death={1961-09-12}{Hamburg}
}
c{female,
name=Gerda Senta Margot Ilse Scholz,
birth={1911-06-16}{Berlin}
}
c{male,
name=Werner Karl August Albert Scholz,
birth={1914-07-12}{Berlin},
death={1978-08-03}{Hamburg}
}
union{
p{male,
name=Heinrich Paul Popp,
birth={1895-01-18}{Schiffbek},
death={1967-08-31}{Hamburg},
marriage={1920-04-30}{Berlin},
comment={Kaufmann}
}
c{male,name=Waldemar Popp}
}
}
parent{
g{male,
name=Hermann August Albert Hille,
birth={1858-08-24}{},
}
}
parent{
g{female,name=Berta Schwarz}
}
}
\end{genealogypicture}
I would like the 2 dates of marriage at Therese's box. I can't find a solution in the manual,

documentclass, packages needed to compile your MWE and\begin{document},\end{document}. – sztruks Nov 11 '18 at 15:22