August 17

- ante diem XVI Kalendas September

Portunalia
Temple of Portunus was probably the "Fortuna Virilis and Vesta" temple in the Forum Boarium.

Iano ad Theatrum Marcelli
Temple of Janus built by C. Duilius after his defeat by the Carthaginians at Mylae in 260 B.C. After the temple's restoration by Tiberius, its dedication date became October 18.