National Speak in Complete Sentences Day is observed annually on May 31st. This day is dedicated to using proper sentence structure while speaking. In fact, you could celebrate the day while texting as well. So no LOL or ASAP on May 31.
May 31, 2015 - Yes, Speak in Complete Sentences Day is a day set aside to recognize and practice in the increasingly lost art of speaking, and writing, properly. As slang, informalism, and texting lingo continue their assault on proper language, this holiday reminds us to enjoy the satisfaction of good language skills.