As I write this, we're officially in Autumnal Equinox (Mabon) season -- the actual day being Sept. 22. I thought I'd post this now because in the face of natural disasters and other difficulties so many of us are now facing, it's good to be reminded that Nature does in its own way move towards balance, and we can too.
Mabon is a recent (20th century) neo-pagan name given by Aidan Kelly, American founder of the New Reformed Orthodox Order of the Golden Dawn, to the seasonal holy day of the Autumnal Equinox. The name has stuck for many followers of the Wiccan path and other neo-pagans. It is not a shamanic designation for the equinox.
The name itself is taken from Welsh mythology, and refers to a member of King Arthur's warriors. Some references note Mabon as a deity or descended from deities. Read the Wiki