There is a similar Northern pagan Tradition at this time, called the Haust blót/Haustblót or Haustablót, but a bit more complex, which i’m about to right it in here at the “Norther Pagan Traditions” folder, and in that writting, maybe you will get to understand the true porpose of this celebrations and enter in the pagan spirit of the thing.
Mabon is often a term referring to the celebration of the autumn equinox, and to know why this name was adopted, we must understand its meaning and where it came from.
The name “Mabon” was introduced in the neo-pagan religions and the seasonal list of celebrations of the year, from the god of hunting “Mabon fab Modron ” in the Welsh mythology, this god was kidnapped, tree days after he was born, and was taken to Annwn.
Mabon is the celebration of the year, when the days start to grow shorter and the nights and darkness will prevail till the winter time comes. A preparation for the harsh winter, when the crops come to an end, and people start to gather food to survive the long dark and cold days of winter. It is also a time to burn the soil and the fields where the crops were, in order to fertilize the land that will be covered by frost and snow, and at the spring time nature will do its work, and the land is ready to be planted again.