<P> Canada 's Constitution Act , 1982 was signed into law by Elizabeth II as Queen of Canada on April 17 , 1982 on Parliament Hill in Ottawa . Queen Elizabeth 's constitutional powers over Canada were not affected by the Act , and she remains Queen and Head of State of Canada . Canada has complete sovereignty as an independent country , however , and the Queen 's role as monarch of Canada is separate from her role as the British monarch or the monarch of any of the other Commonwealth realms . </P>
when did canada gain independence from great britain
April 17 , 1982