Cash-strapped Rotherham United have designated this Saturday's home game against Bristol City at Millmoor as a "Fans United" day.
Rotherham announced in February that they are battling to raise £1m to stay in business and avoid liquidation.
They hope that fans from across the country can turn up at Millmoor to support the Save The Millers campaign.
Other financially-stricken clubs such as Brighton, York and Wrexham have previously held Fans United days.