The last promotion party was held 10 years ago, with an open top bus parade through the city centre.
Plans for a similar celebration this year are likely to be scuppered by COVID - but the current squad - again led by manager Darren Ferguson - will go down in the history books with the 2010-11 team.
The 2010-11 squad included Posh legends, including George Boyd and Craig Mackail-Smith, and thousands packed into the city to see their heroes holding the League One Playoff trophy after earning promotion in the final at Old Trafford, beating Huddersfield Town 3-0.