ante diem x kalendas junias

Tubilustrium -- one of the various rituals conducted in anticipation of the campaign season held in honour of Mars (although tacked on the end of the Quinquatrus, in honour of Minerva); on this day the trumpets (tubae) used to summon the Comitia would be ritually purified.

Festival of Vulcan -- a festival unconnected to the above, but later a connection was invented to honour the divinity credited with making the tubae