Compliment your Mirror Day is a special day dedicated to the "mirror, mirror on the wall", and is observed on July 03,2018. It is a great opportunity to reflect how beautiful the person in the mirror is. To celebrate this occasion in the right manner, just stand in front of a mirror and tell the person you see how handsome he or she is.
A mirror is a reflective surface which is smooth enough that light is reflected. To retain the parallelism of the reflected light and thus develop an image, the roughness of the surface must be less than half the wavelength of the light.