According to the director Alvin Rakoff, Say Hello to Yesterday was 'a 1970 Brief Encounter, a picture designed purely for entertainment, with no morals or messages unless the public like to find them.
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The original title was to have been Whatever Happened to Happy Endings? but Cinerama didn't want to use this title, partly because Jean Simmons had just starred in, and been Academy award nominated for, the similarly titled The Happy Ending, and partly because Cinerama feared that because Whatever Happened to Baby Jane? was a film of the era and there was a series of 'Whatever Happened...' films, they might be sued by other companies.
Yesterday | Born Yesterday | Yester-Me, Yester-You, Yesterday | It's So Hard to Say Goodbye to Yesterday | From Yesterday | The World of Yesterday | Born Yesterday (1950 film) | Between Today and Yesterday | Yesterday's Wine | Yesterday's Ring | Yesterday's Enterprise | Yesterday (2004 film) | Transformers: Ghosts of Yesterday | Tomorrow Is Yesterday | Thoughts of Yesterday: 1981–1982 | Motown 25: Yesterday, Today, Forever | ''Born Yesterday'' |