Beltane — celebration of the conjoining of the goddess with the energy of the god in the sacred marriage which is the basis of all creation.
Imbolc -- reflection on the power of the gods from which physical and spiritual harvest will come.
Litha -- celebration of the sacred marriage in which energy of the gods is poured into the service of life.
Lughnasadh — Wicca/neo pagan observance of first harvest of the year involving agricultural festivals and prosperity magic. The Christian name of Lammas is sometimes used.
Mabon — observance of the autumnal equinox when day and night are of equal length. A harvest festival time.
Ostara -- welcoming of spring and the goddess-as-maiden.
Samhain — celebration of endings and beginnings and of remembering the dead. Revering of elders is also observed.
Yule — a Norse pagan celebration of the winter-born king, symbolized by the rebirth of the sun. A present day Wicca event.
Sept. 21-29 -- Mabon
Nov 1 -- Samhain (Starts at sundown the day before)
Dec 21 -- Yule (Starts at sundown the day before)
Feb 2 -- Imbolc
Mar 19 -- Ostara
May 1 -- Beltane