Search for the roots of today's Christmas traditions and you will find your way back to the ancient Celtic festival of Alban Arthuan, held during the Winter Solstice on December 21.

One of the principle reasons for the rapid propagation of Christianity throughout Europe during the first millennium was the willingness of Christian leaders to incorporate the rituals, beliefs and customs of other religions. Few of the ancient displaced religions were more assimilated than the Druids, Wiccans and Pagans.

Alban Arthuan is also known as Yule, derived from the Anglo-Saxon "Yula," or "Wheel of the Year" and marked the celebration of both the shortest day of the year and the re-birth of the sun.

Alban Arthuan was also believed to be a time of increased fertility, as were many of the other Fire Festivals, such as Samhain and Bealtaine. Early Celtic calendars measured the months according to the moon's revolution of the earth.

The custom of burning the Yule Log, the Yule-associated tradition that is most familiar to people today, was performed to honour the Great Mother Goddess. The log would be lit on the eve of the solstice, using the remains of the log from the previous year, and would be burned for twelve hours for good luck.

Decorating the Yule tree was also originally a Pagan custom; brightly coloured decorations would be hung on the tree, usually a pine, to symbolize the various stellar objects which were of significance to the Pagans - the sun, moon, and stars - and also to represent the souls of those who had died in the previous year. The modern practice of gift giving evolved from the Pagan tradition of hanging gifts on the Yule tree as offerings to the various Pagan Gods and Goddesses.