Which answer matches this clue: the national flag day celebrated on 7 January commemorating the tricolour's adoption in 1797?

• A Festa della Repubblica
• B Festa della Liberazione
• C Festa del Tricolore ✓
• D Festa dell'Unità Nazionale

The tricolour was first adopted by the Cispadane Republic on 7 January 1797 in Reggio Emilia; the day was made a national celebration in 2004.