Slovenia is marking the national holiday dedicated to Primorska, commemorating the day in 1947 when the Paris Peace Treaty with Italy came into force and large parts of the region were transferred to what was then Yugoslavia. The holiday is observed every September 15, although it is not a work free day. This year marks 79 years since the treaty took effect, with ceremonies and commemorations once again highlighting the region’s complicated history, its Slovenian identity and the generations who lived through periods of political pressure, border changes and attempts at cultural assimilation. The central celebration was held in Lipica, where Sežana Mayor Andrej Sila called for unity while acknowledging the continuing debate surrounding the holiday and its name. The ceremony came as Slovenia continues to discuss whether the official wording should describe the event as the “return” of Primorska to the homeland or its “incorporation” into the homeland. The distinction may appear small, but it reflects different interpretations of the region’s history and the political circumstances surrounding the postwar border settlement. The holiday was established in 2005, originally using wording referring to the return of Primorska, before Parliament changed its official name in October 2024 to the current formulation referring to its incorporation.
The historical background goes back well beyond 1947. After the First World War, much of the Slovene Littoral became part of Italy, and Slovenian communities in the area later experienced strong pressure to abandon their language and national identity, particularly under Fascist rule. Resistance movements emerged, including TIGR, while many local people also participated in broader resistance to occupation during the Second World War. When the Paris Peace Treaty entered into force on September 15, 1947, Italy ceded Upper Posočje, the Vipava Valley, most of the Karst and a small part of Istria to Yugoslavia. However, not all Slovenian populated territory was transferred, and many Slovenes remained outside the new border. The question of what the holiday should be called has now returned to the Slovenian Parliament. A proposal has been submitted to restore the original name referring to the “return” of Primorska to the homeland, while some people and organizations in Primorska oppose that change. Their argument is that the historical circumstances make the term “incorporation” more appropriate than “return.” The debate demonstrates how questions of language can remain closely connected to collective memory, especially in a region where borders changed repeatedly and where national identity was strongly contested throughout the 20th century.
For Slovenia, September 15 is therefore about more than a date in the history books. It is a day of remembrance for the people of Primorska, the Karst, the Goriška area and Slovenian Istria, and for the preservation of Slovenian language and culture through difficult periods. The holiday has been observed since 2005, but the continuing discussion about its name shows that the historical story behind Primorska remains a living part of Slovenia’s national conversation.
