Valentine's Day has evolved significantly over its 1,500-year history, originating from two Catholic saints who both died on February 14th. The celebration gained widespread popularity in Australia during the 1970s, when greeting cards cost between 25 cents and $1.25, and has transformed into a major commercial occasion featuring cards, chocolates, flowers and elaborate gestures of affection. From simple romantic gestures to grand public displays like couples renewing their vows at Katoomba, Australians continue to celebrate love in diverse ways across the decades.