EPONALIA

The Roman festival of Eponalia is celebrated on 18th December

Here is a reference to her worship from The Golden Ass by Lucius Apuleius (second century c.e.):

"These thoughts were interrupted by my catching sight of a statue of the goddess Epona seated in a small shrine centrally placed, where a pillar supported the roof-beams in the middle of a stable. The statue had been devotedly garlanded with freshly picked roses. So in an ecstasy of hope on identifying this assurance of salvation, I stretched out my forelegs and with all the strength I could muster, I rose energetically on my hind legs. "

For EPONA

For Epona
of the horses

Sister to
Rigantona
Rhiannon, our Great Queen,
riding across the land from out
of Annwfn

Manifest in our
familiar fields.
Lady of the
horsed palatini
and for whom rode
Arthur

On Llamrei, his own
dear mare,
for the comitatus and the
teuluoedd
in his care;

Be with us here.

{EPONALIA, the festival of EPONA, is on the 18th December}