If you’re to be in Florence this Summer then you should know that, from the 6th of June until the 26th of September 2017, both the Uffizi Gallery and the Galleria dell’Accademia (home to Michelangelo’s David) will have late night openings each Tuesday.
Both will remain open until 10:00 PM with last entry to the Uffizi at 8:00 PM, the Accademia at 8:30 PM.