The ancient Celts who lived some 2,000 years ago, started their calendar on November 1st. To celebrate their new year's eve, they would disguise themselves in animal skins and attempt to predict each other's future, believing that the ghosts returning from the dead provided a conduit for allowing accurate fortune telling. While the tradition of reading tea leaves and peering into crystal balls has faded into obscurity in many western cultures, UK & the US included, most still celebrate October 31st. by donning disguises. Now this holiday is called Halloween, a reference to it falling on the eve or "een" of the Christian holiday of All Saints Day or All Hallows Day.