Historical events for
Sunday, 31 May 2026

King Manuel I (born May 31, 1469, and died December 13, 1521) was the fourteenth King of Portugal. During his historic reign, known as "The Fortunate", the country reached the apex of its imperial expansion with the discovery of the sea route to India by Vasco da Gama and the official arrival in Brazil by Pedro Álvares Cabral.

Ron Toomer (b. 1930) was a legendary American mechanical engineer who revolutionized global amusement ride design. After developing heat shields for NASA's Apollo spacecraft, he pioneered tubular steel technology to create the world's first looping steel roller coasters, designing over 80 major rides.

Liturgical celebration of Saint Petronilla, an early Christian virgin venerated in Rome and traditionally associated by popular piety with the healing of physical ailments. Closes the hagiographical body of May in the traditional Portuguese calendar.

By royal charter, eighteen female schools are formally established in Portugal, marking the creation of the first public education institutions dedicated exclusively to girls in the country's history. The milestone represented a pioneering, though initial, step in women's access to formal instruction.

Belgian chemical engineer Edward de Smedt is granted a United States patent for laying modern sheet asphalt pavement. The innovative method of mixing sand with asphalt compounds fluxed with petroleum oils facilitated urban road paving, debuting with absolute success in Newark.

Sport Lisboa e Benfica is crowned European football champion for the first time in its history by defeating Barcelona's super-team 2-1 at the Wankdorfstadion in Bern. Captained by the charismatic Mário Coluna, the eagles broke Real Madrid's monopoly and inaugurated a golden era for Portuguese football.

Mário Soares, Raul Rêgo, Salgado Zenha, and other prominent regime opponents meet clandestinely in Porto for the Convention of the Portuguese Socialist Action (ASP). The political resistance gathering against the dictatorship consolidated the ideological and organizational foundations that would give rise, in 1973, to the Socialist Party.

Date established by the Member States of the World Health Organization (WHO) aiming to alert the global population to the tobacco epidemic, highlight the health risks associated with tobacco use, and promote effective public policies for consumption reduction.

The World Health Organization (WHO) formally classifies the Delta variant (B.1.617.2) of the SARS-CoV-2 virus as a Variant of Concern. Originally identified in India, the strain triggered global alarms due to its substantially elevated transmissibility rate and its impact on the efficacy of pioneering vaccines.

The orbital alignment determines the Moon's official entry into the Full Moon phase. The astronomical phenomenon occurs with the lunar disc fully illuminated by the Sun, marking the peak of the synodic cycle and influencing tides and nocturnal astronomical observation on a global scale.

Holding of the historic Saint Peter Fair in the picturesque Largo de São Pedro de Penaferrim, Sintra. With origins dating back to the Middle Ages, this traditional market gathers artisans, agricultural producers, and merchants, constituting one of the largest cultural attraction hubs and intangible heritage of the Lisbon region.

The Moon enters the Full Moon phase at 03:11 AM (Local Time).

Liturgical solemnity celebrated by the Catholic, Anglican, and other Western churches on the first Sunday after Pentecost. The festivity invokes and honors the central mystery of the Christian faith: the unity of God in three distinct persons, Father, Son, and Holy Spirit.

Liturgical celebration of Pentecost according to the Eastern Orthodox Church calendar. It marks the fiftieth day after Orthodox Easter, commemorating the descent of the Holy Spirit upon the apostles in Jerusalem and the institutional birth of the universal Church. (Movable date calculated for 2026).

Execution of the main race of the MotoGP Italian Grand Prix at the Mugello International Circuit. The mythical and fast Tuscan track hosts one of the most intense, technical, and charismatic rounds of the world motorcycle racing calendar, before an extraordinary crowd.