"extra deadline" is correct and can be used in written English.
You can use it to refer to an additional deadline that has been added on top of what has already been established. For example, "We were already under a tight deadline, but when our client changed their request at the last minute, we had no choice but to agree to their extra deadline."
It has 45 days to come up with a plan for raising the extra cash a deadline that the markets will be watching with anxiety.Fannie's options are more limited than it would like.
When she has to work extra to meet deadlines for art gallery shows, she hires a sitter.
Ms Merkel's Christian Democratic Union (CDU) wants nuclear power plants, which do not emit carbon dioxide, to run beyond the deadline, buying extra time for the introduction of greener energy.
John Wiltse, his communications director, said on Tuesday that Lt. Gov. M. Jodi Rell had consented to Mr. Rowland's request for "a few extra days" beyond the deadline to move out of the official residence.
For those of you who were looking for an extra few days, the deadline for submitting applications to be a part of the Battlefield at TechCrunch Disrupt NY 2014 has been extended to February 27 at 5 p.m. PST.
It's often impossible to plan anything more than a few days in advance, because you never know when a pitch will present itself, a client will demand a tighter deadline or extra hands will be needed on a last-minute project.
And while she often puts in extra hours to meet deadlines or to make up for time away, she compensates by taking time out for personal activities once pressing duties have been met.
We're extending the deadline on our extra early-bird tickets to next Wednesday, February 24, so you have a few extra days to save $200 before early-bird pricing takes effect next week.
Often, by tacitly sanctioning brutality by the security forces, they make things worse.So it is not encouraging that, in recent days, President Gloria Macapagal Arroyo of the Philippines has given her security forces a two-year deadline and an extra 1 billion pesos ($19m) to wipe out the communist New People's Army NPAArmy NPA
The rest of football has until Saturday for college games, and the N.F.L. front offices have two extra days before the trade deadline, which the league extended in case any G.M. was stuck at home with no power and couldn't get rid of his third-string wide receiver.
