After a long wait, "Sherlock" season 3 is finally within sight as the BBC Christmas lineup looms closer.

During a recent announcement, BBC finally answered the burning question: When is the "Sherlock" season 3 air date?

Well, sort of. According to Metro, "Sherlock" season 3 will definitely have its air date during this Christmas season, but the festive lineup for BBC actually extends until January 4.

Currently, a popular theory for the air date is December 21, although it is a Saturday.

@AnankeDiamond However, Dec 21 is a Saturday. Sherlock traditionally airs in primetime on a Sunday night, due to its episode length.

— Sherlockology (@Sherlockology) November 28, 2013

If "Sherlock" season 3 continues its tradition of airing on a Sunday, however, the possibilities are narrowed down to most likely December 22 or December 29.

But don't worry, although the air date remains a mystery, sources confirm that the official BBC schedule will be announced December 4, and "Sherlock" will definitely be a part of it.

@AnankeDiamond No airdate has been announced yet, though the BBC Xmas schedule is set to be confirmed on Dec 4th. — Sherlockology (@Sherlockology) November 28, 2013

Recently, a brief trailer of "Sherlock" season 3 debuted featuring the much anticipated reunion of Sherlock and Watson.

Check it out below:

One thing is certain. BBC will definitely premiere "Sherlock" before PBS in North America, which has a January 19 air date for "The Empty Hearse."

"They are jaw dropping. They are like small movies. Benedict and Martin are so in their Sherlock-Watson groove. They are so comfortable with that relationship it's like being in the room with them," said "Masterpiece" executive producer Rebecca Eaton.

"We are hugely excited about this next series of 'Sherlock,' and have worked closely with our partners, 'Masterpiece' and PBS, to bring these episodes to U.S. audiences in January. We promise our fans that Season 3 is worth waiting for," added "Sherlock" executive producer Sue Vertue.

Be sure to check back for a confirmation of the air date on December 4!

Other programming for the BBC Christmas lineup include the "Doctor Who" Christmas Special, "Call The Midwife," "Strictly Come Dancing," "Mrs Brown's Boys," and "The Great British Bake Off."