Unknown. Sunglasses Day is a day to protect your eyes from harmful UV rays and to look cool.
How to Celebrate
You can celebrate Sunglasses Day by wearing sunglasses. Just make sure you get the right pair like Arnold Schwarzenegger did in Terminator 2.
To celebrate this day, we selected the 1994 7Up Cool Spot Can. On the can is the 7Up mascot, "Cool Spot" who was used in advertising "The Uncola" in 1987 . In 1993/1994 there was even a Cool Spot game that was released on a few gaming platforms including Sega Genesis and Super NES.
Happy Sunglasses Day (6/27)!
Photos used by permission of CanMuseum.com