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Lateran Treaty Day
Vatican City

Lateran Treaty Day 2025 and 2026 in Vatican City

The Lateran Treaty Day in Vatican City occurs on 11 February each year, regardless of what day of the week this falls on.

202511 FebTueLateran Treaty Day
202611 FebWedLateran Treaty Day
Please scroll down to end of page for previous years' dates.

On February 11, 1929, the Holy See and the Kingdom of Italy signed the Lateran Treaty. This created the Vatican City and brought a resolution to the “Roman Question.” Since the Italian Unification, which took place in 1870, there was a dispute regarding the political status of the Pope in Italy.

However, with the Lateran Treaty enacted, it resolved these issues and helped to create the smallest sovereign state in the world – the Vatican City. Today, Vatican City is only 110 acres and home to a population of 840.

It was the dictator Mussolini who encouraged an alliance with the Vatican. His goal with this action was to eliminate any and all power the Pope had. However, as seen today, the exact opposite happened. Mussolini’s efforts ensured the Pope maintained his status and power in Vatican City, as well as around the rest of the world.

Today, the impact of the Lateran Pact extends much further than Italy. Just a few months after the Treaty was signed, the Vatican State joined the Universal Postal Union. Later on, this was used as a springboard to gain influence in international bodies. Now, the Pope can travel all around the world as a head of state and is even allowed to speak at the United Nations, which is something typically reserved for elected officials or heads of state.

Previous Years

202411 FebSunLateran Treaty Day
202311 FebSatLateran Treaty Day