To be announced (TBA), to be confirmed (TBC), and to be determined (or to be decided, TBD) are placeholder terms used very broadly in event planning to indicate that although something is scheduled or expected to happen, a particular aspect of that remains to be arranged or confirmed.
These phrases are similar, but may be used for different degrees of indeterminacy:
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", "to be done", "to be decided", and "to be declared".
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.
TBD.com was a hyperlocal news site focused on the Washington D.C. area. Launching on August 9, 2010, it was owned by the Arlington-based Allbritton Communications as a locally-focused companion to its other media properties in Washington, including Politico and WJLA-TV. The site combined original reporting with that of independent blogs and contributions from WJLA's reporters and staff. Despite having growing readership, TBD suffered from poor profitability, which led to a series of staff cuts and a shift in focus after only 6 months in operation. TBD.com was shut down entirely in August 2012.
I think we’re trying to figure out how to have a mix of stuff produced by professionals and make sure you’re keeping an eye on all the great stuff that’s being produced by citizens in the area. And you put all those together to create a news report that is different from what you’re seeing so far.
Plans for the site were first announced in October 2009. The site was intended to serve as the broadcaster's main news site for Washington D.C. area news, replacing the existing websites for WJLA-TV and its sister cable channel NewsChannel 8. The official name of the new site, TBD.com, was unveiled on April 22, 2010. Site editor Erik Wemple had already used the name TBD in staff e-mails prior to the announcement, in this case alluding to the phrase "To be determined", but felt that the name would also fit the site's goal.
TBD is an abbreviation often meaning in ordinary writing "to be discussed" "to be done", "to be defined", "to be decided", "to be determined", "to be deleted", etc. It may also refer to:
Day by day I'm falling more in love with you
And day by day my love seems to grow
There isn't any end to my devotion
It's deeper dear by far than any ocean
I find that day by day you're making all my dreams come true
And (So) come what may I want you to know
I'm (That I am) yours alone, and I'm in love (in love) to stay
As we go through the years day by day
(I said, "Day by day")