Samhain ~
October 31st... The most important festival, marking the beginning and end of the year, the beginning of the resting season of the land and a time of remembrance of those who have gone before.
A feast of the Goddess as Crone and Wise one.....

Yule~
21st of December... The winter solstice when the decreasing days give way to increasing light and life and we celebrate the rebirth of the Sun.

Imbolc~ 
2nd February... the time when the first signs of life are returning to the land and the Goddess changes her robes of Crone to those of the Maiden.

Ostara~
21st of March... the spring equinox, when day and night are equal, the festival of the Goddess Astarte, and whos symbols are the egg and the hare.

Beltane~
1st of May... the second most important festival of the year, when the Goddess changes her robes of Maiden to those of Mother and we celebrate the marriage of he Goddess and the God.

Litha~
21st of June... the summer solstice.
Here the sun is at the peak of its power, from this time onwards, the days gradually grow shorter again.

Lammas~
1st of August... the festival of the first of the harvest, the feast of Lugh and of the sacrificial king, who is these days most often represented by a gingerbread man.

Mabon~
21st of September~ the autumn equinox, once more a time of balance, when day and night are equal, the feast of the height of the harvest.

Extract was taken from:
The real witches Kitchen by Kate West.