Ubajay is a village and municipality in Entre Ríos Province in north-eastern Argentina.^[1] Formerly known as Pueblo Palmar and Colonia Palmar Yatay, it is a pioneer of Jewish immigration. It was promoted by the Jewish Colonization Association, a philanthropic entity created by Baron Maurice de Hirsch. On January 5, 1915, the Ubajay Station of the Argentine Northeast Railway was inaugurated, a date that is taken as foundational. The railway symbolized, at the beginning of the 20th century, as a vital artery of Argentine national production, between the Northwest and Mesopotamia, where migratory currents from Europe bet on the hope of development and progress.

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Ubajay
Municipality and village
Country	Argentina
Province	Entre Ríos
Department	Colón
Time zone	UTC−3 (ART)

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Its name comes from the Guarani language, and it refers to the fruit tree Eugenia myrcianthes, which are abundant in the region.