Getting hyperref to work with \citeyear and \citeyearpar in biblatex

Question

When used in concert with the hyperref package, biblatex automatically creates hyperrefs for citations but not if they are inserted using \citeyear or \citeyearpar.
Is it possible to add a hyperref to year only citations?

\documentclass{article}

\usepackage[backend=biber,natbib=true, style=authoryear-comp]{biblatex}

\usepackage{filecontents}

\begin{filecontents}{\jobname.bib}
@article{ref1,
  author = {Doe, John D.},
  title = {Hyperrefs to citations},
  journaltitle = {Links Everywhere},
  volume = {1},
  date = {2000},
  pages = {1--2},
}

\end{filecontents}

\addbibresource{\jobname.bib}

\usepackage{hyperref}

\begin{document}

citet -- \citet{ref1}

citeyear -- \citeyear{ref1}

citeyearpar -- \citeyearpar{ref1}

\printbibliography

\end{document}

Answer 1

One has to redefine the citation commands instructing to use hyperlink, namely:

\DeclareCiteCommand{\citeyear}
    {}
    {\bibhyperref{\printdate}}
    {, }
    {}

\DeclareCiteCommand{\citeyearpar}
    {}
    {\mkbibparens{\bibhyperref{\printdate}}}
    {, }
    {}