The future president will be sworn in on January 26 -- more than a month after the vote, which is scheduled to take place on December 4.
The delay aims to give authorities sufficient time to investigate any
potential claims of electoral fraud or irregularities in the vote, which pits far-right candidate Norbert Hofer against independent ecologist Alexander Van der Bellen.
The last ballot result from May was annulled after Austria's highest court upheld the narrowly defeated far-right's claims of procedural irregularities.
And in a fresh twist earlier this month, the government was forced to
postpone October's planned re-run after it emerged that the envelopes for postal votes were not sticky enough, meaning they could easily be reopened.
In May's election, Hofer of the anti-immigration Freedom Party (FPOe) lost by just 31,000 votes.
If he wins this time, the FPOe candidate would become Europe's first
far-right head of state since 1945.
While recent polls have put the far-right hopeful in the lead, a new survey released this weekend showed Van der Bellen gaining ground.
Published by the Oesterreich tabloid, the poll of 800 people gave the green contender 49 percent and Hofer 51 percent, with a four-percent margin of error.
Austria has been without a president since July 8 when Heinz Fischer
stepped down. He was replaced on an interim basis by the speaker of parliament and two deputy speakers.
The role of Austria's president is largely ceremonial but not entirely. He
or she can in theory sack the government -- something that Hofer has in the past threatened he would do.
On Wednesday, the parliament is to pass a bill confirming December 4 as the new re-run date.