Yule - December 21 to January 1
the twelve day celebration commemorating the winter solstice
Ostara - festival celebrating the coming of spring, light, and the renewal of the Sun
Beltane - a fire festival that celebrates of the coming of summer and the fertility of the coming year.
Litha - commencing on the eve of the Summer Solstice, celebrates the midsummer, and the power of the sun god
Lammas - a festival to mark the annual wheat harvest, and is the first harvest festival of the year
Mabon - a day to give thanks to nature or Mother Earth for a good harvest and to pray to their gods and goddesses that the crop would last throughout the winter.
Samhain - the festival marking the end of the harvest season and the beginning of winter