To be announced, To be confirmed, and To be determined (often abbreviated as TBA, TBC, and TBD, respectively) are placeholder terms used very broadly to indicate that although something is scheduled or anticipated to happen, a particular aspect of that thing remains to be arranged. Although the phrases are often used interchangeably, they have subtle differences. "To be announced" implies that the aspect so designated may have already been determined, but is not yet suitable for public announcement. "To be confirmed" suggests that a decision has been made but awaits confirmation, although it is also used to indicate that the aspect to be scheduled remains open. Other similar phrases sometimes used to convey the same meaning, and using the same abbreviations, include To be ascertained, To be arranged, To be advised, To be adjudicated, and To be decided.

Use of the abbreviation "TBA" is formally reported in a reference work at least as early as 1955, and "TBD" is similarly reported as early as 1967.

Juan Bautista Justo (born June 28, 1865 in Buenos Aires - died on January 8, 1928 in Buenos Aires) was an Argentine physician, journalist, politician, and writer. After finishing medical school he joined the Unión Cívica Radical, later participating in the foundation of the Socialist Party in 1896, of which he was chief director until his death. He married Alicia Moreau de Justo, with whom he had three children.

Justo studied medicine at the Universidad de Buenos Aires while working as a journalist to earn a living. He graduated with honors in 1888, after which he travelled to Europe where he learnt about socialist ideas. Back in Argentina, he worked as a surgeon at the Hospital de Crónicos.

Justo wrote his first pieces at the La Prensa newspaper as a parliamentary journalist. At the beginning of 1890 he started writing for the socialist newspaper El Obrero. In 1894, together with Augusto Kühn and Esteban Jiménez he founded the La Vanguardia publication that became two years later, with the creation of the Socialist Party, the official organ of the party. In 1905 La Vanguardia became a daily newspaper, in an important cultural extension that exceeded its original purpose of political diffusion. Justo directed the newspaper until his death.