
1) Greek animal sacrifice 2) Non-Gregorian June observance
Found on
https://www.crosswordclues.com/clue/buphonia

In ancient Greece, the Buphonia (Βουφόνια `ox-slayings`) denoted a sacrificial ceremony performed at Athens as part of the Dipolieia, a religious festival held on the 14th of the midsummer month Skirophorion— in June or July— at the Acropolis. In the Buphonia a working ox was sacrificed to Zeus Polieus, Zeus protector of the city, in.....
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http://en.wikipedia.org/wiki/Buphonia

buphonia In Greek antiquities, a sacrificial ceremony, forming part of the Dilpolia, a religious festival held on the 14th of the month of Skirophorion (June-July) at Athens, when a laboring ox was sacrificed to Zeus Polieus as protector of the city in accordance with a very ancient custom. The ox was driven to the altar, on which grain was spread...
Found on
http://www.wordinfo.info/words/index/info/view_unit/1644/
No exact match found.