National Microwave Oven Day - December 6


On December 6, give one appliance in the house a little consideration.  It’s National Microwave Day!

Quite by accident, self- taught American engineer Percy Spencer discovered a way to heat food safely with microwaves. While working with an active radar in 1945, he noticed a candy bar in his pocket was melting. The high-powered microwave beams created a heating effect ideal for cooking. Spencer deliberately attempted cooking popcorn with the microwaves and an egg was next.  The egg was less successful than the popcorn.  It exploded in his fellow engineer’s face!

Spencer, employed by Raytheon, experimented with different methods of heating food safely with microwaves.

  • Raytheon filed a United States patent application for Spencer’s microwave cooking process on October 8, 1945.
  • Raytheon built the first commercially available microwave oven in 1947.  It was called the “Radarange.”
  • It is believed that 90% of homes in the United States have a microwave in them.


To celebrate National Microwave Oven Day, cook your favorite meal in the microwave tonight or heat up some of last night’s dinner in there. Use #MicrowaveOvenDay to post on social media. 


Within our research, we were unable to find the creator or origin or National Microwave Oven Day.

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Today it is estimated 90% of all homes have one... Microwave Oven Day celebrates the convenience of the invention.