
1) Ancient Roman festival 2) Non-Gregorian May observance
Found on
https://www.crosswordclues.com/clue/floralia

In ancient Roman religion, the Floralia was a festival in honor of the goddess Flora, held April 27 during the Republican era, or April 28 on the Julian calendar. In Latin, the festival was known as the Ludi Florae, the Games (ludi) of Flora. Under the Empire, the games lasted for six days. The festival had a licentious, pleasure-seeking atmospher...
Found on
http://en.wikipedia.org/wiki/Floralia
No exact match found.