Semana de Mayo (May Week)

Semana de Mayo — May Week — runs across the last week of May, building toward the national public holiday on 25 May. The date commemorates the Revolución de Mayo of 1810, when a public assembly in Buenos Aires removed the Spanish viceroy and established a local governing junta. It was the opening act of Argentina’s independence movement, though the formal declaration of independence did not come until 1816 in Tucumán.

The significance of 25 May

The Revolución de Mayo is considered the foundational moment of Argentine national identity. The events took place over a week in late May 1810, which is why the full week carries ceremonial weight rather than a single day. The Cabildo — the colonial town hall on the south side of Plaza de Mayo in Buenos Aires — was the seat of the colonial administration and the site where the political negotiations of that week played out. It is now a museum and remains open to visitors year-round.

Events in Buenos Aires

Plaza de Mayo is the focal point of the week’s public programming. Official ceremonies on 25 May include a formal ceremony at the Cabildo, a Te Deum service at the adjacent Metropolitan Cathedral (where the mausoleum of General José de San Martín is located), and a presidential address. Military honours and a public gathering fill the square.

In the days before the 25th, the plaza and surrounding streets host outdoor concerts, cultural performances, and food events. The atmosphere is civic and communal rather than a commercial festival.

Around the country

Every province marks the week with its own events. Schools hold patriotic acts in the days before the holiday, with primary school children dressed in period costumes representing figures from 1810 — a visible tradition throughout Argentine towns and cities in late May. Provincial capitals organise outdoor concerts, folk music performances, and municipal ceremonies.

Food: locro

The food most closely associated with 25 May is locro, a thick stew made from maize, white beans, and slow-cooked cuts of pork and beef. It originated in the northwestern provinces and became the national holiday dish partly because its warming properties suited the late-autumn climate of Buenos Aires. Most Buenos Aires restaurants and street food stalls serve it specifically around this date. If you are in the country during Semana de Mayo, trying locro from a street vendor outside Plaza de Mayo is one of the more direct ways to participate in the occasion.

Practical tips

25 May is a full public holiday. Banks, government offices, and many businesses close. Restaurants in tourist areas of Buenos Aires generally remain open. Book any accommodation in Buenos Aires for the 25 May weekend ahead of time, as domestic tourism peaks around the holiday.

For background on Buenos Aires’s historic centre and the sites connected to Argentine independence, see our Buenos Aires guide and our practical guide to visiting Argentina.