25 April in the Margem Sul — The Carnation Revolution
The day Portugal’s dictatorship ended. What the revolution was, why the south bank’s shipyard workers mattered, and what April 25th means and feels like in the Margem Sul today.
Updated April 2026The Day That Made Modern Portugal
25 April 1974 is the date that defines modern Portugal. After 41 years of the Estado Novo dictatorship, a coordinated movement of mid-ranking army officers overthrew the regime in a near-bloodless coup that took roughly six hours from dawn to victory. The day was christened the Carnation Revolution — for the red flowers a flower-seller, Celeste Caeiro, distributed to soldiers, who put them in their rifle barrels.
For the Margem Sul, 25 April has a particular weight. The industrial workers of the south bank — particularly at the Lisnave shipyards near Setúbal — had been organising clandestinely against the regime through the late 1960s and early 1970s. In the months following the revolution, those same workers were one of the major political forces shaping what happened next: nationalisations, decolonisation, the slow construction of a democratic constitution.
This guide covers the day itself, the south bank’s role, what 25 April means today, and how it’s celebrated across the Margem Sul.
Why the Revolution Happened
The dictatorship, the colonial wars, and the army’s breaking point.
The Estado Novo (1933–1974)
António de Oliveira Salazar took executive power in 1932 and consolidated the Estado Novo dictatorship in 1933. After his incapacitation in 1968, Marcelo Caetano continued the regime until 1974. Together, the regime ran Portugal for 41 years — censorship, the secret police PIDE/DGS, suppression of opposition, suppression of unions and the Communist Party, conservative Catholic ideology, and economic underdevelopment compared with Western Europe.
The colonial wars (1961–1974)
Portugal fought three simultaneous wars to retain its African colonies: Angola, Mozambique, and Guiné-Bissau. The wars dragged on for 13 years, conscripted hundreds of thousands of young Portuguese men, killed many thousands, and bled the economy. By 1973 most senior officers in the army knew the wars were unwinnable.
The Movimento das Forças Armadas (MFA)
Mid-ranking captains and majors, frustrated by professional grievances and increasingly opposed to the colonial wars, organised secretly through 1973 and early 1974. The Movimento das Forças Armadas (Armed Forces Movement) coordinated what was originally framed as a professional protest but quickly became an instrument for ending the dictatorship.
The labour movement
Despite ferocious repression by PIDE, clandestine union and political organising continued throughout the regime. The industrial concentration of the south bank — Lisnave, Setenave, Quimiparque, Setúbal’s canneries — made the Margem Sul one of the major centres of underground worker activity. By 1974, networks were ready to surface the moment the regime fell.
25 April 1974 — Hour by Hour
A near-bloodless coup, run by radio signals and tank columns.
22:55 (24 April) — Grândola, Vila Morena
Radio Rádio Renascença played José Afonso’s banned song "Grândola, Vila Morena" at 10:55pm on 24 April. The MFA had agreed in advance that the song would be the second of two coded radio signals confirming the operation was on. (The first signal — Paulo de Carvalho’s "E Depois do Adeus" — had already played.)
03:00 onwards — troops mobilise
Across the country, MFA officers led their units into action. In Lisbon, military convoys formed up and moved towards key government buildings.
Dawn — columns reach central Lisbon
By dawn, MFA columns under Captain Salgueiro Maia had reached central Lisbon. Tanks took position in Praça do Comércio. The dictatorship’s last hours had begun.
Early morning — Marcelo Caetano besieged
Prime Minister Marcelo Caetano took refuge in the Quartel do Carmo barracks in central Lisbon. MFA troops surrounded the barracks. Tense negotiations followed.
Afternoon — Caetano surrenders
Caetano surrendered late afternoon to General Spínola, on the condition that power be handed to the General rather than directly to MFA captains. Caetano flew into exile in Madeira and then Brazil. The dictatorship was over.
The carnations
During the morning, Lisbon flower-seller Celeste Caeiro — coincidentally distributing the red carnations from a restaurant celebrating its first anniversary — began handing them to soldiers in the streets. The troops put them in their rifle barrels and on their uniforms. The image became the defining symbol of the day. The revolution gained its name.
Casualties
Four civilians died, all shot by PIDE secret police during a confrontation outside the PIDE headquarters in Lisbon. The military operation itself was bloodless. By international standards of regime change, the Carnation Revolution was extraordinarily peaceful.
Why the Margem Sul Mattered
The industrial concentration of the south bank made it a centre of revolutionary politics in the year that followed.
Industrial concentration
By 1974, the south bank held some of Portugal’s largest industrial workplaces. The Lisnave shipyard at Mitrena (just east of Setúbal) employed many thousands of workers; nearby Setenave was similar; the Quimiparque chemical complex in Barreiro employed thousands more; Setúbal’s canneries continued at industrial scale. The combination created a working-class density that few other parts of Portugal could match.
Underground organising
That density made the Margem Sul one of the major centres of clandestine union and political organising under the dictatorship. The Communist Party (PCP) had deep roots; left-wing splinter parties grew in the late 1960s; and the everyday networks of mutual aid, strike preparation, and political education were strong despite PIDE surveillance.
The Lisnave moment
In the months following 25 April 1974, Lisnave workers became one of the most visible political forces of the early revolutionary period. A famous mass demonstration of Lisnave workers in central Lisbon in September 1974 helped shape the political balance during the period of revolutionary instability that followed the coup. The shipyard workers’ involvement in the early revolutionary period is one of the most-studied episodes in modern Portuguese labour history.
Decolonisation and return
Portugal granted independence to Angola, Mozambique, Guiné-Bissau, and Cape Verde within a year of the revolution. Several hundred thousand Portuguese settlers (the retornados) returned to a country still in revolutionary upheaval. Many settled in greater Lisbon, including the south bank. The cultural transformation that followed reshaped the demographics of the region.
The Festa do Avante
The annual Festa do Avante — the Portuguese Communist Party’s political-cultural festival, held every September at Quinta da Atalaia in Amora — is the most visible legacy of the south bank’s revolutionary politics. Whatever your view of the party, the festival itself is one of the largest cultural events in Portugal — 100,000+ visitors across three days of music, food, and culture. See our festas guide.
25 April in the Portuguese Imagination
More than just a national holiday — the day that’s woven through the language, the music, and the politics.
Liberdade
The single word most often associated with 25 April is "Liberdade" — freedom. Pre-1974, freedom of speech, of association, of political expression were all curtailed. The revolution returned them. The phrase "25 de Abril, sempre!" ("25 April, always!") is a frequent rejoinder in political discourse to anything that smells of authoritarianism.
The songs
"Grândola, Vila Morena" by José Afonso is the unofficial anthem of the revolution. Played at every commemoration; sung in football stadiums; quoted in political speeches. "E Depois do Adeus" by Paulo de Carvalho — the first radio signal — is a softer companion. Both songs remain instantly recognisable to every Portuguese person.
The carnation
The red carnation has become the emblem of the day. Worn on lapels on 25 April; arranged in vases in cafes and homes; carried in marches. The symbol is universally Portuguese rather than partisan.
The bridge
The bridge across the Tagus from Lisbon to Almada — opened in 1966 as the "Salazar Bridge" and renamed "25 de Abril" after the revolution — is the single most legible piece of revolutionary symbolism in daily Portuguese life. Driving across it (or seeing it from a beach, or photographing it from anywhere in the Margem Sul) is a daily reminder.
The constitution
The constitution that emerged from the revolution — ratified in 1976 — remains the basis of Portuguese democracy today, with significant amendments over the years but the same revolutionary core. Article 1 declares Portugal a sovereign Republic founded on the dignity of the human person and the popular will, committed to building a free, just, and solidary society. The phrasing is unmistakably a revolutionary document.
How 25 April Is Celebrated in the Margem Sul
The day on the south bank — what to expect, where to go.
National holiday
25 April is a national public holiday across Portugal. Banks, public services, and most shops close. Restaurants typically open; many run special menus and music programmes.
Câmara Municipal events
Each Margem Sul municipality runs its own programme. Almada, Seixal, Setúbal, Sesimbra, and Palmela all stage commemorative events — speeches by the mayor, military or civic ceremonies, and (most importantly for visitors) free public concerts in the evening.
The free concerts
The 25 April concerts are one of the most reliable cultural fixtures of the year. Seixal in particular is known for high-quality free concerts on 25 April — recent years have featured Sérgio Godinho, A Garota Não, and other respected Portuguese artists. The crowds are large; the atmosphere is family-friendly and politically warm.
Marches and parades
Lisbon hosts the largest civic march — the famous "Avenida da Liberdade" march that goes down the eponymous boulevard with carnations, banners, and the revolutionary songs. Locally, Almada and Seixal both host smaller civic marches. Easy to join from the Margem Sul.
Food and family
Many south bank families turn 25 April into a long lunch with friends and extended family. Caldeirada, fresh fish, regional wines. The day blends commemoration with the broader Portuguese love of long-table eating.
Visiting from abroad?
Late April is one of the best times to visit Portugal — mild weather, low tourist season, and the chance to experience a national holiday with deep meaning. If you’re thinking about moving to the Margem Sul, planning a viewing trip around 25 April lets you see how the area carries its history.
If you’re here on 25 April
Three things to do: walk across the 25 de Abril bridge or take the Cacilhas ferry under it (you’ll see flags). Spend the evening at one of the free Seixal or Almada concerts. Listen to "Grândola, Vila Morena" at least once during the day. The day rewards a small amount of attention.
Where to Learn More
Books, documentaries, and museums for going beyond the basic story.
The 25 de Abril Museum (Lisbon)
The Museu do Aljube — Resistência e Liberdade — is housed in the former PIDE prison in Lisbon’s Alfama. The most comprehensive permanent exhibition on the dictatorship and its end. A short ferry ride from the south bank.
Films
"Capitões de Abril" (2000), directed by Maria de Medeiros, is the standard cinematic treatment of the revolution day — a fictionalised but well-researched portrayal of the MFA captains in the hours of the coup.
Music
Beyond the radio-signal songs, listen to José "Zé Mario Branco", Sérgio Godinho, Adriano Correia de Oliveira. A whole generation of Portuguese music came out of and into the revolution.
Books
Kenneth Maxwell’s "The Making of Portuguese Democracy" is the standard English-language history. In Portuguese, the literature is enormous — Fernando Rosas, José Pacheco Pereira, and others have written authoritative accounts.
Local memory
Speak to older residents in Almada, Seixal, or Setúbal. Plenty of people who lived through the day are still around. Their accounts are often the most moving entry into the period.
The 50th anniversary (2024) and beyond
2024 marked the 50th anniversary of the revolution and ran an extended programme of commemoration, exhibitions, and rediscovery. The momentum carried into 2025 and 2026, with renewed attention to the events of 1974–1976. The historical reflection on what the revolution achieved — and what it didn’t — is genuinely alive in Portuguese public discourse right now.