May Revolution
The May Revolution was not the product of the actions of a single political party with a clear and defined agenda, but a convergence of sectors with varying interests. Thus, there are a number of conflicting perspectives about it, because different authors highlight different aspects. Mitre, for example, referred to "The Representation of the Landowners" (an 1809 economic report by Mariano Moreno) and the role of the merchants to support the view that the May Revolution intended to obtain free trade and economic integration with Europe; right-wing revisionists center around Saavedra and the social customs of the time to describe the revolution under conservative principles; and left-wing revisionists use the example of Moreno, Castelli and the rioters led by French and Beruti to describe it as a radical revolution.
Sun of May
The specification ""of May"" is a reference to the May Revolution which took place in the week from 18 to 25 May 1810, which marked the beginning of the independence from the Spanish Empire for the countries that were then part of the Viceroyalty of the Río de la Plata. A legend claims that as the new government was proclaimed, the sun broke through the clouds, which was seen as a good omen.