Minipage won't format properly

Question

I need help with this. Why Block B is being printed below Block A? I need to have it right to Block A.

\documentclass[10pt]{article} % Font size - 10pt, 11pt or 12pt.

\usepackage[hmargin=1.25cm, vmargin=1.5cm]{geometry} % Document margins.

\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\rfoot{{\sffamily Last update: \today}}

\renewcommand{\headrulewidth}{0pt} % Get rid of the default rule in the header.

\begin{document}

\begin{minipage}[t]{0.5\textwidth} % Start the left-hand side of the page.
\vspace{0pt} % Trick for alignment.
Block A.
\end{minipage} % End the left-hand side of the page.

\hfill % ----------------------------------------------------------------------

\begin{minipage}[t]{0.44\textwidth} % Start the right-hand side of the page.
\vspace{0pt} % Trick for alignment.
Block B.
\end{minipage} % End right-hand side of the page.

\end{document}

Answer 1

\documentclass[10pt]{article} % Font size - 10pt, 11pt or 12pt.

\usepackage[hmargin=1.25cm, vmargin=1.5cm]{geometry} % Document margins.

\usepackage{fancyhdr}
\pagestyle{fancy}
\fancyhf{}
\rfoot{{\sffamily Last update: \today}}

\renewcommand{\headrulewidth}{0pt}% Get rid of the default rule in the header.

\begin{document}

\noindent
\begin{minipage}[t]{0.5\textwidth}% Start the left-hand side of the page.
Block A.
\end{minipage}% End the left-hand side of the page
\hfill % ----------------------------------------------------------------------
\begin{minipage}[t]{0.44\textwidth}% Start the right-hand side of the page.
Block B.
\end{minipage}% End right-hand side of the page.

\end{document}

I have moved the spaces before your % as these will produce unwanted white space in the output, I removed the paragraph breaks between the minipages and removed the vspace "trick" which would prevent the minipages aligning on the baseline of their first row.