Happy Birthday Mark Antony!
January 14 is Mark Antony's 2105th birthday! On contemporary Roman fasti, such as the Fasti Verulani (below), the date is marked as D•VITIOSUS•EX•S•C.
image source (the first full line says: [F xi]x EN d . vitiosus . ex . s . c . anT . naTal, i.e. F [nundinal day] xix [days before the Kalends] EN [endotercissus: the type of day, where most religious or political proceedings were not permitted in the morning or evening but were acceptable in the middle of the day] d [dies] vitiosus ex . s . c . [abbreviation of Ex Senatus Consulto i.e. by decree of the Senate] anT [abbreviation for Antonius/Antony] naTal [abbreviation of natalis, a substantive noun meaning "birthday"] transl.: "a defective day, as decreed by the Senate, Antony's birthday")
Octavian (not yet Augustus), after the death of his brother-in-law/ally-turned-enemy at Actium in 30 BC and his assumption of power over Rome, had the Senate label Mark Antony's birthday as a DIES VITIOSUS (i.e. a bad, faulty, defective, corrupt day) so that Antony's remaining followers would be unable to celebrate his birthday.
However, after the death of Augustus, this decree appears to have somewhat weakened, as the Emperor Claudius celebrated Antony's birthday, claiming that he was also celebrating the birthday of his father Drusus in addition to his grandfather Antony.