The <a href="https://en.wikipedia.org/wiki/South_Africa_Act_1909" id="mwsQ" rel="mw:WikiLink" title="South Africa Act 1909">South Africa Act</a> comes into force, establishing the <a href="https://en.wikipedia.org/wiki/Union_of_South_Africa" id="mwsg" rel="mw:WikiLink" title="Union of South Africa">Union of South Africa</a>.