Let's see what Wikipedia has to say about today:
"May 4 is considered a holiday by Star Wars fans to celebrate Star Wars culture and honor the films. It is called Star Wars Day because of the popularity of a common pun spoken on this day. Since the phrase "May the Force be with you" is a famous quote often spoken in the Star Wars films, fans commonly say "May the fourth be with you" on this day. Current day Star Wars fans were not the first to introduce the line "May the fourth be with you": when Margaret Thatcher was elected Britain's first female Prime Minister on May 4, 1979, her party placed an advertisement in The London Evening News that said "May the Fourth Be with You, Maggie. Congratulations." This reading of the line has also been recorded in the UK Parliament's Hansard.
In a 2005 interview on German news TV channel N24, Star Wars creator George Lucas was asked to say the famous sentence "May the Force be with you." The interpreter simultaneously interpreted the sentence into German as Am 4. Mai sind wir bei Ihnen ("We shall be with you on May 4"). This was captured by TV Total and aired on May 18, 2005.
In 2011, the first organized celebration of Star Wars Day took place in Toronto, Ontario, Canada at the Toronto Underground Cinema. Produced by Sean Ward & Alice Quinn, festivities included an Original Trilogy Trivia Game Show; a costume contest with celebrity judges; and the web's best tribute films, mash-ups, parodies, and remixes on the big screen. The second annual edition took place on Friday, May 4, 2012.
In 2013, Disney's Hollywood Studios celebrated the holiday with several Star Wars events and festivities."
How to Celebrate
You can celebrate this day watching Star Wars movies, dressing up like your favorite Star Wars character, or by having lightsaber battle with your friends. You can also play LEGO Star Wars (the video games or the actual LEGO toy) or you can see if there is a Star Wars event in your area. Perhaps you can browse other Star Wars cans here at BevReview. One thing you should definitely do is say "May the Fourth be with You" to everyone you encounter today.
To celebrate this day, we selected a 2005 Pepsi Can from the Russian Federation, part of the Star Wars: Episode 3 set. This can has a lightsaber battle scene between Obi Wan Kenobi and Anakin Skywalker.
Happy Star Wars Day (5/4)!