simulanter
From LSJ
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
Latin > English (Lewis & Short)
sĭmŭlanter: and sĭmŭlātē,
I advv., v. simulo fin. A. and B.
Latin > French (Gaffiot 2016)
sĭmŭlantĕr, c. simulate : Apul. M. 8, 10.
Latin > German (Georges)
simulanter, Adv. (simulans), zum Scheine, vorgeblich, Apul. met. 8, 10.