\documentclass{article}
\usepackage{milestonetimeline}

\begin{document}
\begin{timeline}[width=14,startdate=2025-01-01,enddate=2025-12-31]
  \timelinetitle{Basic Project Timeline}
  \milestone[above]{2025-01-15}{Project Kickoff}
  \milestone[below]{2025-03-31}{Phase 1 Complete}
  \milestone[above]{2025-06-30}{Phase 2 Complete}
  \highlightmilestone[below]{2025-09-30}{Major Milestone}
  \milestone[above]{2025-12-31}{Project Complete}
\end{timeline}
\end{document}