AZ (or A.Z.) follows the format of AD (or A.D.) "Anno Domani" and BC (or B.C.)
So AZ must mean "Anno Zombie" (fully "in the year of zombie") or "After Zombie," and BZ must mean "Before Zombie."
After the ZN1 outbreak, survivors the world over started a new count of years.
03 AZ is 3 years after the zombie apocalypse.
The first case of infection is recorded in 2016, making it year 00 AZ.
Then 03 AZ equals 2019 by todays count. This can be told by:
- Murphy commenting that the files from Fort Collins, Colorado are from two years before the first outbreak. The date on the files are 2014.
- A Flashback Character mentions Hurricane Sandy
- In another flashback, a Doctor remarks that a person has been sick for almost seven years since The Earthquake in Haiti, and it is listed as 1 BZ.
- According to creator Karl Schaefer the apocalypse began on November 9th 2016.