All the institutions available on B-Ticket (Galleria dell'Accademia, Museo Nazionale del Bargello, Cappella Medici e Orsanmichele) are open from Tuesday to Sunday from 8:15 to 18:50. Instead, they will remain closed all Mondays, 1st of January and 25th of December.
There could be days of special opening/closure, in order to receive additional information about these kinds of days we suggest you to visit the specific webpage of the desired institution:
Galleria dell'Accademia di Firenze
Musei del Bargello | Rinascimento e oltre
Or to write a request to our email address.