April 17th | Fastorum Liber Quartus: Aprilis
C N LUDI | XV Kal. | IV.677-678, the Hyades set tonight.
Sed iam praeteritas quartus tibi Lucifer Idus
respicit: hac Hyades Dorida nocte tenent.
677 But when you shall have counted the fourth day after the Ides, the Hyades will set in the sea that night.1
M, the editor of Ovid Daily, has also written a translation of Liber IV.
1
The true evening setting was on April 20.