Samhain the 1 November date was a Germanic rather than a Celtic idea. In the 11th century, 2 November became established as All Souls' Day. This created the three-day observance known as Allhallowtide: All Hallows' Eve (31 October), All Hallows' Day (1 November), and All Souls' Day (2 November). It is widely believed that many of the modern secular customs of All Hallows' Eve (or Halloween) were influenced by the festival of Samhain. Samhain and Samhain-based festivals are held by some Neopagans. As there are many kinds of Neopaganism, their Samhain celebrations can be very different despite the shared name. Some
Samhain for example the Brythonic Calan Gaeaf (in Wales), Kalan Gwav (in Cornwall), and Kalan Goañv (in Brittany), both Celtic branches are roughly as old as each other. Samhain is believed to have Celtic pagan origins and there is evidence it has been an important date since ancient times. Some Neolithic passage tombs in Ireland are aligned with the sunrise around the time of Samhain. It is mentioned in some of the earliest Irish literature and many important events in Irish mythology happen or begin on Samhain. It was the time when cattle were brought back down from the summer pastures