https://www.youtube.com/watch?v=up3Y_yQIma8
"Star Wars Day is an informal commemorative day observed annually on May 4 to celebrate George Lucas' Star Wars media franchise. Observance of the day spread quickly through media and grassroots celebrations since the franchise began in 1977." https://en.wikipedia.org/wiki/Star_Wars_Day
Some see May_25 as an important STAR WARS day as well. https://en.wikipedia.org/wiki/Star_Wars_Trilogy#Films
Indeed, 6 of the first series of STAR+WARS movies were all released in May.
https://en.wikipedia.org/wiki/List_of_Star_Wars_films#Skywalker_saga
As well as, Solo:_A_Star_Wars_Story in 2018.
https://www.starwars.com/news/tag/george-lucas