Many people confuse Samhain and Halloween. Michael Tortorello sets them straight in the New York Times:
How will you be celebrating Samhain this year? What’s that? You say you won’t be observing the high Druid holiday of the ancient Celts? With all due respect, you’re probably wrong and you probably will.
“Samhain is Halloween; Halloween is Samhain,” said Ellen Evert Hopman, 61, an author, herbalist and Druid priestess and scholar. Irish monks, by most accounts, co-opted the earthy ritual and recast it with strait-laced saints. But the bones of the holiday wouldn’t stay buried.
The first historical record of Samhain, an engraved bronze calendar found in Coligny, France, dates to the first century B.C. The Druids of the British Isles went to ground a few centuries later, after the Romans rode in on chariots and “trashed the place,” Ms. Hopman said. All the same, she said: “There have been people celebrating Samhain in Europe for thousands of years.