ante diem vi nonas maias

a.k.a. Floralia (day 6) -- a festival originally ordered in response to an interpretation of the Sybilline books in 238 B.C., it fell into desuetude only to be revived in 173 B.C.; it was a general festival of drinking and other merriment in honour of Flora, who presided over (of course) flowers and their blossoms