Red Planet Day, observed annually on November 28, celebrates humanity’s enduring fascination with Mars, the "Red Planet." It has a very thin atmosphere over a dusty, chilly, desert world. Along with having seasons,

Every year on November 28, we celebrate Red Planet Day, a day all about Mars, which is the fourth planet from the Sun. Mars is often called the Red Planet due to its reddish color and has fascinated people—scientists and non-scientists alike—for many years.

Red Planet Day celebrates significant scientific achievements and inspires ongoing research into Mars' geology.