Which country's flag is in the picture?

The flag of Italy is a tricolour featuring three equally sized vertical pales of green, white and red, with the green at the hoist side. Its current form has been in use since 18 June 1946 and was formally adopted on 1 January 1948.

The Tricolour Day, Flag Day dedicated to the Italian flag, is established by law n. 671 of 31 December 1996, which is held every year on 7 January. This celebration commemorates the first official adoption of the tricolor as a national flag by a sovereign Italian state, the Cispadane Republic, which took place in Reggio Emilia on 7 January 1797. The Italian national colors appeared for the first time in Genoa on a tricolor cockade on 21 August 1789, anticipating by seven years the first green, white and red Italian military war flag, which was adopted by the Lombard Legion on 11 October 1796.