Z Day
Z Day is held on January 1. 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 no matter the place or occasion. This event in the first decade of the month January is annual. 
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January 1st is officially known as National Hangover Day as well as Z Day. On this first day of the year it seems fitting to let the last letter of the alphabet shine.
It's a day when the alphabetical order is reversed, and those whose names begin with the letter Z come first in all matters of alphabet sequence. How many people is that? Well, more than you might think. If your name is always called out last on the register because it starts with Z, today it's going to be the other way around.
Similar holidays and events, festivals and interesting facts
Unlucky Day on December 31 (You get the chance to get all the bad things out of the way, do next year will be happy, healthy and prosperous);
No Interruptions Day on December 31
Make Up Your Mind Day on December 31
Cinderella Day in Japan on December 31 (Shinderera De);
Commitment Day on January 1 (The first known Commitment Day was celebrated in 1960 as an extension of the tradition of New Year’s Resolutions—however);
First Foot Day on January 1
Polar Bear Swim Day or Polar Plunge Day on January 1 (Canada and United States);
National Creampuff Day and National Buffet Day in United States on January 2
Happy Mew Year for Cats Day on January 2 (The founders, Tom and Ruth Roy, wanted cats to have a very special New Year's celebration all to themselves);
Run it Up the Flagpole and See if Anyone Salutes Day on January 2 (It means to float an idea to see what people think, or if they notice);
Science Fiction Day on January 2
National Pet Travel Safety Day in US on January 2