Lupercalia
noun
Lu·per·ca·lia ˌlü-pər-ˈkā-lē-ə 
-ˈkāl-yə
: an ancient Roman festival celebrated February 15 to ensure fertility for the people, fields, and flocks
Lupercalian
ˌlü-pər-ˈkā-lē-ən
adjective -ˈkāl-yən
Word History
Etymology
Latin, plural, from Lupercus, god of flocks
First Known Use
circa 1580, in the meaning defined above