If the mole sees his shadow then we'll have three more months of summer... wait a second, that might be a different holiday (or perhaps wishful thinking).
National Mole Day is actually a celebration of chemistry. The "Father of Chemistry", Italian Amedeo Avogadro, discovered chemistry's basic measuring unit (6.02x10^23), known as Avogadro's Number. "For a given molecule, one mole is a mass (in grams) whose number is equal to the atomic mass of the molecule." In 1991, the National Mole Day Foundation was formed and the holiday is celebrated annually on October 23 by nerds all across the globe.
All that mumbo-jumbo being said, we thought it would be more fun to create wallpapers of animal moles and facial moles for your holiday enjoyment.