How to display two different dates on my title page?

My aim is to display both the experiment and the report date on the title page of my report; how can I achieve my goal?

Edit: Part of my code before the main part is as follows:

\documentclass[12pt]{article}
\usepackage{a4, color}
\usepackage{amsmath, amsfonts, amssymb}
\usepackage{siunitx}
\begin{document}
\title{Understanding Semiconductor Lasers}
\author{Ongun Ar\i sev}
\date{\today}
\maketitle
\newpage


Thanks

• Could you be more specific? Possibly provide a MWE as to what you want to achieve? – azetina Oct 13 '13 at 21:29

Under the default document classes (including article), you can just add another date to \date:

\documentclass[12pt]{article}
\title{Understanding Semiconductor Lasers}
\author{Ongun Ar\i sev}
\date{\today{} and January 1, 2013}
\begin{document}
\maketitle
\end{document}

• Well, thanks. I am pretty new in LaTeX so forgive my question. Could I also add Experiment date like some sort of modifier in front of one of the dates? – Vesnog Oct 13 '13 at 22:24
• @Vesnog: Yes, you can do \date{Report: \today{}; Experiment: January 1, 2013} if you wish. – Werner Oct 13 '13 at 22:28
• Can I have them pasted on separate lines? Figured it out by putting \\ but if I wanted to separate them more is there an option allowing that? – Vesnog Oct 13 '13 at 22:35
• @Vesnog: You can use \\[<len>] where you specify <len>. For example, \\[\baselineskip] inserts an empty line. Or \\[50pt] will insert a 50pt gap. – Werner Oct 13 '13 at 23:18
• Well thanks for that they will definitely prove useful. – Vesnog Oct 13 '13 at 23:29