The phrase "May the Force be with you" originated in Star Wars: Episode IV A New Hope and has continued to be part of Star Wars stories ever since.

In 1973, Adelino Saldanha was borned on May 4, so the force with him. "May the Force be with you" was listed as #8 of the AFI's 100 Years...100 Movie Quotes.

Many fans  like myself celebrate in May 4th as "Star Wars Day" by paraphrasing the phrase as "May the fourth be with you." / "May the 4th be with them all."