The phrase "a fortnight until" is correct and usable in written English.
It can be used to indicate a period of two weeks leading up to a specific event or deadline.
Example: "There is a fortnight until the project deadline, so we need to finalize our plans."
Alternatives: "two weeks until" or "14 days until".
The hazel sticks will be bundled up and left in a pond for a fortnight, until they're used for making hurdles.
He took a millilitre of milk every two hours, continuing on donor milk for a fortnight, until his mother was able to lactate.
With less than a fortnight until polling day, Labour is gaining ground on the Conservatives, who are now just five points ahead, according to the latest YouGov poll for the Times.
With less than a fortnight until the 7 October vote, Bolsonaro, a pro-torture former army captain who recently called for his political opponents to be shot, leads polls with about 28% of the vote.
It is less than a fortnight until the launch of the new iPhone, but shoppers outside Apple's flagship London store express no enthusiasm at the thought of queuing up for it.
There is less than a fortnight until the details of a new financial settlement are announced, and councils still have no idea what, if any, method of redistributing income from rich to poor boroughs will be used.
And he added that the ECB didn't ask Lewis to name the three men who the Leicestershire all-rounder had been told had received money for fixing matches until a fortnight ago.
Not so: with under a fortnight left until we find out what's in store for Batman and Bruce Wayne, fresh footage is still turning up on the internet.
With a fortnight to go until Money in the Bank, the marque match is now made.
With less than a fortnight to go until the Irish general election, the dominant theme of campaigning this week will be whether Fine Gael can govern alone without Labour.
With less than a fortnight to go until Doctor Who's 50th anniversary, a dark cloud has been cast over the celebrations.
