* "This picture of a crater resembling a "happy face" was acquired by the Context Camera (CTX) on Mars Reconnaissance Orbiter on January 28, 2008. The unnamed crater is about 3 kilometers (1.9 miles) across. It is located among the Nereidum Montes, north of the Argyre basin, near 45.1°S, 55.0°W. North is toward the right and sunlight illuminates the scene from the upper right."
(And Here is the other 'smiley' found in '99. Happy (hippie?) Martians! wOOt!)
...isn't a Martian day something like, 39.5 minutes longer than an Earth day (yes, I did have to 'google' that)? Well, great!!!