On this day a nerdy Bill Gates and Paul Allen developed some nerdy thing called an 'interpreter' which they found a buyer for - so they created a company called Micro-Soft.
That was back in 1975.
Software used around the world, and the world is celebrating World Rat Day today.
Why?
Who knows.
It's also the same day as International Carrot Day.
Rats probably like carrots, no?
