May the Fourth Be With You

"Do. Or do not. There is no try."

— Yoda, The Empire Strikes Back

May the Fourth started as a grassroots fan celebration and wasn't officially recognized by Lucasfilm until 2013
The original Star Wars (1977) had a budget of $11 million — it grossed $775 million worldwide
Yoda's species has never been officially named in any Star Wars media
The Wilhelm Scream appears in every Star Wars film
R2-D2 and C-3PO are the only characters to appear in all nine Skywalker Saga films