As per http://sysadminday.com/:
System Administrator Appreciation Day is a 24-hour event occurring on the Last Friday of July.
It’s the single greatest 24 hours on the planet… and pretty much the most important holiday of the year. It’s also the perfect opportunity to pay tribute to the heroic men and women who, come rain or shine, prevent disasters, keep IT secure and put out tech fires left and right.
So say IT loud; say IT proud …