The part of the sentence "change the deadline" is correct and usable in written English.
You can use it when you are talking about moving up or pushing back a deadline or time frame. For example: We may need to change the deadline for our project if we want to finish on time.
"Then it doesn't happen, and I have to change the deadline".
He could not ask for more time from the team, nor could he change the deadline.
The party decided to change the deadline after visitors to its website earlier in the day were met with a "502 Bad Gateway" error message.
Canfin said France was willing to change the deadline to 2016, to allow more time to take into account the reservations of developing countries.
He urged the state to change the deadline from two years after the accident to three years after the worker is disabled.
In recent weeks, he has demanded an extension of the Brexit deadline to give time to hold a new election, ignoring that Britain can't change the deadline unilaterally.
Medicare officials said in June that they would develop legislative proposals to change the deadlines in the Balanced Budget Act, but so far they have not submitted such proposals to Congress.
"We do try to provide that information to callers when they are upset," he said, noting that Governor Andrew Cuomo floated a proposal to change the deadlines in his 2015 state of the state address and that various legislators have introduced bills in the past to little avail.
And your briefs make it very clear that they exercised their equitable powers to remedy a threat to fundamental constitutional rights and changed the deadline accordingly.
Second, although it suspends AB 32, it doesn't change the 2020 deadline for industries to lower their carbon footprint.
