It's Star Wars Day: May the 4th be with you

It's not a national holiday, yet it might be an intergalactic one.

May the Fourth, as in "May the Fourth Be With You" has become a day to celebrate all things Star Wars, especially following last year's revival of the series with "Star Wars: The Force Awakens."

One the stars of the current Star Wars trilogy, Daisy Ridley, appeared in a YouTube video surrounded by some of the series' characters to deliver well wishes from the cast of "Star Wars: Episode VIII," which is set for release next year.

The day has been a trending topic on social media. Comedy Central's "@midnight" got things started by launching a #StarWarsSongs hashtag, asking fans to come up with Star Wars themed song titles. Some of the responses include "Whiskey in the Jar Jar" and "When You Wish Upon a Death Star."

NASA got in on the fun with a blog comparing real planets to the ones depicted in Star Wars, including Saturn's moon, Mimas, which has become known as the "Death Star" moon thanks to its distinctive crater.

Retailers are trying to turn fan enthusiasm into a profit. Many, including Wal-Mart, Target and Toys 'R' Us are offering promotions on Star Wars related items this week.