In the early 20th century gambling with dice was illegal in many states and so gamblers went to some pains to hide the dice when challenged by the police. Courts would sometimes throw out cases if the dice weren't offered in evidence. Thus "no dice." ( source ) Today when we say it we are actually saying that we are refusing the proposal presented. 

Wear Brown Shoes Day Uh, okay? Well fortunately I have brown shoes so I can wear them today.  You? What to Wear with Brown Shoes for Women What Should Men Wear with Brown Shoes? Think outside the box: you can't wear them but you can listen to them, Brown Shoe Band . Santa's List Day Are you naughty or nice? Find out here . Bartender Appreciation Day Bartending Basics What it Takes to Be a Professional Bartender 10 Greatest TV and Movie Bartenders of All Time Cookie Day 12 Days of Cookies Today would be a fun day to host a cookie exchange . The History of the Cookie Cookie Monster's Famous Sugar Cookie Dough World Wildlife Conservation Day Today focuses on awareness and ways to protect the wildlife of this world in danger of extinction. The best organization to connect with regarding this is the World Wildlife Fund . Dice Day This is a fun day! First of all, my boss' last name is Dice so that's a bit funny! The Invention and History o...