Sunday 28th April was the Roman fertility festival of flowers and crops called Floralia, that later developed into a celebration of sexuality, and may have influenced the subsequent celebrations for Beltane and May Day. Or it could have been the other way around ...
According to Pliny (circa 240 BCE), celebrations were to solicit protection from the Goddess Flora, associated with flowers, blossoming plants and fertility.
The festival lasted for six days and incorporated Ludi Florae, the "Games of Flora". The revelry was much enjoyed by Plebeian members of Roman society and seems to have involved actresses performing naked as well as other racy behaviour. Brightly coloured clothes were worn (if any!), races and shows were performed.
Image (above right) from Wikipedia shows the Triumph of Flora by Giovanni Battista Tiepolo [painted ca. 1743, Public domain], via Wikimedia Commons. It's a scene based on Ovid's description of the Floralia.
Thanks also to resource page on Floralia at penelope.uchicago.edu.
For a list of Joanna's forthcoming Harmony Healing events - not involving any naked floralia celebrations - see this recent Harmony Healing Event Update.