Strange to think most Alien films are summer releases
Aside Alien Resurrection in late Nov 97 and AvPR on xmas day (but who cares about that pos).
You'd think they'd aim for winter or near halloween, (I remember being perplexed in 2017 when they released Alien Covenant in May and Blade Runner 2049 in Oct)
was certain Alien had come out winter 79 near Star Trek but just checked and it was May 79
https://www.the-numbers.com/movies/franchise/Alien#tab=summary