Dies fasti
Black's Law Dictionary · Henry Campbell Black, M.A. · 1910
Black's Law Dictionary
In Roman law. Days on which the courts were open, and justice could be legally administered; days on which it was lawful for the prætor to pronounce [ham; the three words, "do," "dice," "addico." Mackeld. Rom. Law, § 39, and note; 3 Bl. Comm. 424, note; Calvin. Hence calied "triverbial days," answering to the dies juridici of the English law.