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 3520 Venu National Awareness Calendar Communities National Awareness Days Next Occurrences Sep 18 3521 Sep 18 3522 Sep 18 3523 Sep 18 3524 Sep 18 3525 Share this event