This is the 4542nd most frequent Portuguese word.
confirmadas
"Confirmed."
Here, 'confirmadas' is used as a past participle indicating that the dates have been confirmed.
As datas do evento foram confirmadas ontem à noite.
The event dates were confirmed last night.
In this sentence, 'confirmadas' also serves as a past participle showing the state of being confirmed.
As reservas já estão confirmadas para o próximo mês.
The reservations are already confirmed for next month.
Here, 'confirmadas' is again a past participle demonstrating the action completed by the investigators.