Wow! lots more of us than I thought!
I'm a 2nd degree Georgian Wiccan, which basically means I started out in a coven and am now trained enough (so my High Priestess tells me, anyway) to start my own coven. I haven't done so yet, because I haven't met the right people-- apparently the Lady wants me to be solitary for a while.
Samhain (which I was taught was pronounced Sow-hen) is considered the New Year. Just as we begin life within the darkness of the womb, so we begin the circle of the year in the darkness of winter, which officially begins on the same day as Halloween. The Celts considered the day to begin at sunset (more starting in the darkness! lol) so that's why it's called Hallows-evening (Halloween)
When our children were home, we made quite a big deal about Samhain. We actually started it several days before. Each evening, we would light another candle and remember those that have gone before; starting with the animals and plants that had died that year so that we might live, continuing through our ancient ancestors, military that had died for our freedom, relatives, and finally on Samhain itself we would present the Feast of the Dead for all those that had died in the previous 12 months.
I remember one particularly powerful Samhain ritual that our coven did which involved both a guided meditation to the Underworld, and the High Priest invoked the aspect of the Crone within me. It was amazing. I had expressed a little anxiety about it during the planning- asking "What if She doesn't come?" He told me I could 'fake it' if She didn't come, but he told me later that was just to calm me down. He knew it would happen. When he called Her aspect to come forth, they threw a black shawl over my head, and it was as if it weighed 100 lbs! Suddenly I was all bent over and I felt a calm confidence (which, believe me, is NOT me). After the others helped me to be seated, I called each person to me and had them draw a card from the tarot deck, and then I told them what the card portended. Now- I had just STARTED to learn the cards, and the Major Arcana especially were still shaky for me; but I had absolutely NO trouble telling people what the card meant for them. Also, according to DH, my voice changed a little during this-- not a lot, but he said my delivery was different.
That was the most amazing thing to ever happen to me...
QUAIL: as 2dream said, the moon is very important in Wicca. The phases of the moon coincide with the aspects of the Goddess- New or waxing moon for the Maiden, Full moon for the Mother, Waning moon for the Crone. When we salute the full moon, we are acknowledging the Mother of us all. The ritual of saluting the moon can be very simple or very complex as the worshipper prefers.
All Gods are One God, All Goddesses are One Goddess, and together they are The Initiator.