Somebody who's on my Twitter timeline published a tweet last night to announce that Airplane! was released on that day in 1980.
I haven't seen it for a few years, so thought I might have a watch of it. I then concluded that maybe I should wait until next year seeing as it'll be the fortieth anniversary of its release.
If I do follow through with this plan, I might hold off and wait until the British release date.
As was pretty normal back then, US cinemas were far ahead of the British screens. We didn't get movies for months. Using the example of Airplane! - it came out on July 2nd 1980 but it apparently popped up over here on August 29th of the same year.
Even though I own the film on DVD, I have searched Sky Cinema and it's on there.