Bristol City chairman Steve Lansdown is urging Robins fans to inundate the local authority to show their support for Sainsbury's Ashton Gate relocation plans.
The Robins are keen to move into a new state-of-the-art stadium which would find a quarter of its funding as a result of the supermarket chain moving its Winterstoke Road store onto the site of City's current ground.
The decision will be made by Bristol City Council and a petition in support of the new stadium has now attracted 30,000 signatures.
Lansdown told the club's official website: "This is a huge fixture for the football club and I hope our fantastic supporters will attend en masse.
"The Sainsbury's plans are crucial to the new stadium which, in turn, is crucial to the future of the club. I hope to see the council chamber packed out and the College Green full with our supporters.
"While we must always stay polite and respectful to those who oppose the scheme, it is important we win over a vocal minority and take this club and this city forward. I hope everyone who can make it down there turns up to back us."