ἐν δὲ μηνὸς πρῶτον τύχεν ἆμαρ → it chanced to be on the first of the month, that day fell on the first of the month
tristĭtas: ātis, f. tristis,I sadness (anteclass.), Pac. ap. Non. 182, 2; so Turp. ib. 182, 4.