Sundays and holidays: 8.30am, 10.00am, 11.30am and 5.30pm (this last one in Gregorian chant and Latin).
On weekdays, celebrations at 6pm are in Latin and in Gregorian chant, followed at 6:30pm with vespers in Latin and Gregorian chant.
So you should be good to go for tomorrow Friday, follow the WEEKDAY schedule above.
Checked on the official site, it is only in Italian but this is the info on there:
Orari delle celebrazioni eucaristiche
Domenica e festività: 8:30, 10:00, 11:30 e 17:30
La celebrazione delle 17:30 è in latino e in canto gregoriano
Giorni feriali: 18:00, in latino e in canto gregoriano
Ogni pomeriggio alle 18:30 la comunità monastica celebra i vespri in latino e in canto gregoriano