US And Its Unique Measurement System

Everything in US is different including measurement system. US uses a measurement system called 'customary units', which is developed from old English units. The rest of the world uses metric system that has measuring units like meters, liters and grams. UK has more confusing measuring system, which is a mix of all measuring systems! 

United States is the only country that has Month/Day/Year date format. The whole world finds it weird and argues about logic behind it.