\documentclass{article}
\usepackage{milestonetimeline}

\begin{document}
\begin{timeline}[
  width=16,
  heightabove=1.5,
  heightbelow=1.5,
  startdate=2025-01-26,
  enddate=2025-12-11
]
  \timelinetitle{Date-Based Timeline}
  \milestone[above]{2025-01-26}{Kickoff}
  \milestone[below]{2025-02-06}{Vendor Selection}
  \milestone[above]{2025-03-15}{Requirements}
  \milestone[below]{2025-04-12}{Prototype}
  \highlightmilestone[above][heightabove=2.5]{2025-09-02}{User Training}
  \milestone[below]{2025-10-20}{UAT Complete}
  \milestone[above]{2025-12-01}{Go-Live}
  
  \datemarker{2025-04-01}{Apr}
  \datemarker{2025-08-01}{Aug}
  \datemarker{2025-12-01}{Dec}
\end{timeline}
\end{document}