Below is the list of national holidays, celebrated by all Italians:
Jan 1 2002 New Year's Day. Jan 6 Epiphany. Apr 1 Easter Monday. Apr 25 Liberation Day. May 1 Labour Day. Aug 15 Assumption. Nov 1 All Saints' Day. Dec 8 Immaculate Conception. Dec 25 Christmas Day. Dec 26 St Stephen's Day.
Jan 1 2003 New Year's Day. Jan 6 Epiphany. Apr 21 Easter Monday. Apr 25 Liberation Day. May 1 Labour Day. Aug 15 Assumption. Nov 1 All Saints' Day. Dec 8 Immaculate Conception. Dec 25 Christmas Day. Dec 26 St Stephen's Day.
Feast days of patron saints are also observed locally. Many businesses and shops may be closed in Milan on December 7, the Feast of St. Ambrose. Avoid scheduling a business trip to Italy in August, when most of the locals are on vacation, especially around Assumption, the August 15 national holiday. You will find many restaurants and shops in Milan closed.