Solstice-related observances (see also June 20): We Tripantu, a winter solstice festival in the southern hemisphere. (Mapuche, southern Chile)

Wiñoy Tripantu is the Mapuche celebration that marks the return of the sun, often referred to as the Mapuche New Year. It occurs on the June solstice, which is the shortest day of the year in the Mapuche homeland in the Southern Hemisphere. Sometimes, the term We Tripantu is used interchangeably with Wiñoy Tripantu, but some Mapuche language speakers use We Tripantu for the Gregorian calendar New Year and reserve Wiñoy Tripantu for the June solstice celebration.

The Mapuche, also known as Araucanians, are a group of Indigenous inhabitants of south-central Chile and southwestern Argentina, including parts of Patagonia. The collective term refers to a wide-ranging ethnicity composed of various groups who share a common social, religious, and economic structure, as well as a common linguistic heritage as Mapudungun speakers. Their homelands once extended from Choapa Valley to the Chiloé Archipelago and later spread eastward to Puelmapu, a land comprising part of the Argentine pampa and Patagonia. Today the collective group makes up over 80% of the Indigenous peoples in Chile and about 9% of the total Chilean population .The Mapuche are concentrated in the Araucanía region. Many have migrated from rural areas to the cities of Santiago and Buenos Aires for economic opportunities, more than 92% of the Mapuches are from Chile.

Chile, officially the Republic of Chile, is a country in western South America. It is the southernmost country in the world and the closest to Antarctica, stretching along a narrow strip of land between the Andes Mountains and the Pacific Ocean. Chile had a population of 17.5 million as of the latest census in 2017 and has a territorial area of 756,102 square kilometers (291,933 sq mi), sharing borders with Peru to the north, Bolivia to the northeast, Argentina to the east, and the Drake Passage to the south. The country also controls several Pacific islands, including Juan Fernández, Isla Salas y Gómez, Desventuradas, and Easter Island, and claims about 1,250,000 square kilometers (480,000 sq mi) of Antarctica as the Chilean Antarctic Territory. The capital and largest city of Chile is Santiago, and the national language is Spanish.