Unification Day of Istria, Rijeka, Zadar, and the Islands in Croatia is commemorated every year on May 15. The day marks the official transfer of these regions from Italy to Yugoslavia after World War II, as a consequence of the Paris Peace Treaties signed in February 1947.

Historical Context:

After World War I, with the Treaty of Rapallo in 1920, these territories were annexed by Italy. Following World War II and the defeat of Axis powers, an agreement was reached that transferred control over Istria, parts of the Rijeka-Fiume area, Zadar (Zara), and several Adriatic islands from Italy to Yugoslavia.

Traditions:

The day is marked by:

• Official Ceremonies: Local governments and officials often lay wreaths and hold ceremonies at monuments commemorating the fallen and those who suffered during the transition period.
• Cultural Events: Various cultural programs highlighting local history, music, dance, and art may be organized.
• Educational Activities: Schools and institutions might focus on educating about the historical significance through lectures or presentations.

What People Do:

On Unification Day:

• Citizens across these regions reflect on their shared history.
• Many attend ceremonies or participate in local events.
• It's a day to celebrate regional identity within Croatia's diverse cultural tapestry.

The commemoration serves as a reminder of the complex history that shaped modern-day Croatia and its borders.