Cowan's legal team is hoping a precedent set in Canada, over the use of "Mr Big' crime gang undercover operatives to gain a confession, may see the murder conviction overturned.
Cowan's video-taped confession was a key part of the prosecution case against him.
His lawyer Tim Meehan told 9NEWS a retrial would change his client's life "incredibly".
"He's very happy that we've got a date, he's very keen for the appeal to run," Mr Meehan said.
"Really the centre-point of the whole argument is the admissions that Brett made to the undercover officers should never have seen the light of day.
"They should never have been played to the jury."
Cowan's confession was recorded in an elaborate undercover police sting in which detectives posed as a group of criminals.
The investigation technique, called "Mr Big", was used by police in Canada to catch killers there since the 1990s.
But a recent decision by Canada's High Court over a similar case, where an accused killer was given a retrial, has given Cowan's legal team hope, Nine reported.
Cowan's appeal will be heard on November 26 and 27.
News of the appeal date comes just a day before the Day for Daniel which will see thousands walk in his honour -and continue the push for child safety - across Australia.
Cowan's lawyer revealed in April he would lodge an appeal on the grounds that the jury in his trial should have never heard recordings of his confessions.
Cowan was sentenced in March to life imprisonment with a non-parole period of 20 years for Daniel's murder on December 7, 2003.
He was convicted after a Supreme Court jury heard Cowan had confessed to the murder and led undercover police officers, posing as gangsters, to Daniel's remains at an old sandmining site in Glass House Mountains.
The 44-year-old claimed he falsely confessed to the crime to gain the trust of a powerful crime boss who was, unbeknown to him, a covert police operative.
Bruce and Denise Morcombe told Nine they were 'quite comfortable' with the appeal process.
"We knew it was going to happen."
Queensland Attorney-General is also appealing Cowan's sentence, arguing Cowan's 20-year sentence is inadequate.