
1) Ancient Roman festival 2) Festival of Mars
Found on
https://www.crosswordclues.com/clue/tubilustrium

In Ancient Rome the month of March was the traditional start of the campaign season, and the Tubilustrium was a ceremony to make the army fit for war. The ceremony involved sacred trumpets called tubae. Johannes Quasten, however, argues that the common term for war trumpets being tubae is not the same as the tubi form here. He states that tubi was...
Found on
http://en.wikipedia.org/wiki/Tubilustrium
No exact match found.