In Ireland and Wales, the annual Feast of Rhiannon is celebrated by many Wiccans in honor of the Celtic/Welsh Mother Goddess Rhiannon. Rhiannon was originally known as Rigatona (the Great Queen) and was identified with Epona (the Gaulish Mare Goddess).
In ancient Greece the annual rite called the Anthesteria was held to honor the Keres (souls of the dead). This ritual lasted for three days.
In 1968 the Church of All Worlds was formally chartered, thus becoming the first federally recognized Neo-Pagan Church.