May 18

• Hot Wheels Day
  

• I Love Reese’s Day
  

• International Museum Day
  

• Mother Whistler Day
  

• National Cheese Soufflé Day
  

• National HIV Vaccine Awareness Day
  

• National No Dirty Dishes Day

• National Speech Pathologist Day
  

• National Visit Your Relatives Day
  

• Send An Electronic Greeting Card Day
  

• Theology Day
  

• World AIDS Vaccine Day
  

• Armed Forces Day
  

• National Learn To Swim Day
  

• Plant a Lemon Tree Day
  

• Preakness Stakes
  

• World Fiddle Day
  

• World Whisky Day