Date Format to show out of date records

nshaw75 Do you want to highlight whole record/item or just column/cell?

As you mentioned "column format", try using SharePoint JSON column formatting based on date column like: 

{
  "$schema": "https://developer.microsoft.com/json-schemas/sp/v2/column-formatting.schema.json",
  "elmType": "div",
  "txtContent": "[$DateColumn.displayValue]",
  "style": {
    "background-color": "=if(Number([$DateColumn])==0,'',if([$DateColumn] < addDays(@now, -365),'#ff0000','#0b6623'))",
    "color": "=if(Number([$DateColumn])==0,'','#FFFFFF')",
    "padding-left": "10px"
  }
}

Where [$DateColumn] is an internal name of your date column in SharePoint list in this format: [$InternalNameOfColumn]. You can get the internal name of your SharePoint list columns by following this article: How to find the Internal name of columns in SharePoint Online?

Output: 

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