Labor has called it historic, democratic and energising, but in less than a day the month-long leadership contest between Anthony Albanese and Bill Shorten will be just one thing - over.
Both the party caucus and rank-and-file members have cast their vote for the next parliamentary leader, with ballots now closed and counting underway before Sunday's announcement.
ALP members and supporters will be the first to know the result when party headquarters sends out an email at about 2pm.
Under reforms introduced by former Prime Minister Kevin Rudd, caucus and members are given a 50-50 say in determining who will lead the fight against the Abbott government from opposition.
Mr Shorten is believed to have won the caucus vote and is "quietly confident" grassroots members will back him, while Mr Albanese will be hoping his popularity among the rank-and-file gets him over the line.
After a month of friendly debates and largely similar campaigns, both potential leaders laid low on Saturday ahead of learning their fate.
But former Labor leader Mark Latham had no qualms offering his tips, saying he believed Mr Albanese would prevail.
"I voted for Bill Shorten in the ballot and I'm hopeful he might win tomorrow, but on the balance, probably Anthony Albanese will get the job," he told the Seven Network on Saturday.
"The important thing is for Labor to get behind one leader who will be there at the next election."
Sunday's victor will be the party's seventh leader in four years, but it's hoped the new leadership process will stabilise Labor and end the revolving door of leadership.
Mr Latham said the process was designed to put the "sub-factional warlords" who control Labor's caucus out of business.
Shadow parliamentary secretary Matt Thistlethwaite, who backed Mr Shorten, said the caucus vote had been genuinely open and free of factional interference.
He didn't know who would emerge the victor, but said that was the "great beauty" of the new-look process.
"What we now can say is the Labor Party has a much more democratic, transparent and accountable system for electing our leader," he told Sky News on Saturday.
"I think overall it's been a win for the Labor Party."
About 30,000 of the party's 43,000 members are believed to have voted under the new rules, which senior Labor figures credit with renewed interest in the party in the wake of their election defeat.
ALP president Jenny McAllister said the leadership contest had been "incredibly energising".
"In the process we've also had about 4500 people make inquiries about how to join," she told the Seven network."People like to see us talking in positive ways about what we could contribute to the Australian public rather than tearing ourselves apart."