In 1845, Congress designated the first Tuesday following the first Monday in November as Election Day for presidential elections by federal law.
 
Image: Campaign button from Lyndon Johnson's 1964 presidential campaign (Gilder Lehrman Institute, GLC09750)
  
  
  
  
  
  
  
  
  
  
  
      
  
      
  
      
  
      
  
      
  