For my thesis, I need to add references in footnotes and a bibliography that is sorted by date. To achieve this, I switched from biblatex-chicago to the windycity style in biblatex. This works fine for the notes themselves, but I get some empty parentheses in my bibliography. I found out that this is caused by the fact that some of my references have dates with months and days, but I set date=year in my preamble. The empty parentheses would normally enclose the month. How can I remove all the months and days from dates without having to alter my .bib file.
Here is my MWE:
\documentclass{article}
\usepackage[reflist=true, style=windycity, date=year]{biblatex}
\bibliography{biblatex-examples}
\begin{document}
Date with month: \cite{shore}
Date without month: \cite{doody}
\printbibliography
\end{document}

