People whose first or last name start with the letter Z must have it pretty rough—most processes, systems and organizations use alphabetical sorting as standard, meaning they are always last, not matter what the place or occasion. Could get a bit annoying after years and years, don’t you think?
Z Day was created to give those whose names begin with Z’s a bit of a break by letting them do things they may not get to do all that often, like go first in line, to get picked earlier and to stand in front instead for the back for a change.
The History of Z Day
More Details...
All details taken directly from provider content at http://www.daysoftheyear.com/days/z-day/