Home Events Calendar - Inland Empire Town Planner National Cheeseburger Day National Cheeseburger Day Honoring America’s favorite sandwich with a slice of cheese each year on September 18th. + Add to Google Calendar + iCal / Outlook export Tags: national foo Date Sep 18 2443 Venu National Awareness Calendar Communities National Awareness Days Next Occurrences Sep 18 2444 Sep 18 2445 Sep 18 2446 Sep 18 2447 Sep 18 2448 Share this event