The abbreviation "tba" stands for "to be announced." It is often used in contexts where specific information, such as details of an event, date, or time, has not yet been disclosed but is expected to be provided later.
The abbreviation "tba" comes from the phrase "to be announced," which is composed of the infinitive form of the verb "to be" and the past participle "announced." It originated in the 20th century alongside the increasing need for shorthand communication in business and media.