How to add parenthesis around the question mark after the date which is uncertain in biblatex?

Question

First a MWS and its output are as follows.

\documentclass[american]{article}
\usepackage[style=authoryear,dateuncertain=true]{biblatex}
\addbibresource{\jobname.bib}

\begin{filecontents*}[overwrite]{\jobname.bib}
@book{somebook1769,
  location = {Place},
  author  = {Name, Given},
  title   = {Some title of this publication},
  date    = {1769?},
}
@book{somebook1889,
    location = {Paris},
    author  = {Name, Given},
    title   = {Some title of this publication},
    date    = {1889},
}
\end{filecontents*}

\begin{document}
some quote from \cite[1348--1368]{somebook1769} and \cite{somebook1889}

\printbibliography
\end{document}

As you see I add a question mark after the date which is uncertain. Then how to add parenthesis around the question mark? For example, change 1769? for 1769(?).

Answer 1

The macro that controls the uncertainty marker is called \bibdateuncertain. Its default definition is a question mark, but you can easily add parentheses as follows

\documentclass[american]{article}
\usepackage[style=authoryear,dateuncertain=true]{biblatex}

\renewrobustcmd*{\bibdateuncertain}{\mkbibparens{?}}

\begin{filecontents*}{\jobname.bib}
@book{somebook1769,
  location = {Place},
  author   = {Name, Given},
  title    = {Some title of this publication},
  date     = {1769?},
}
@book{somebook1889,
  location = {Paris},
  author  = {Name, Given},
  title   = {Some title of this publication},
  date    = {1889},
}
\end{filecontents*}
\addbibresource{\jobname.bib}

\begin{document}
some quote from \cite[1348--1368]{somebook1769} and \cite{somebook1889}

\printbibliography
\end{document}