I always assumed that it was a sign of respect to keep the writers out of the shredder, along the lines of all the men there sporting Saddam mustaches as a show of deference.
On the other hand, it is interesting to compare that salutation with a lot of western writing that includes "In the year of our Lord..."
-PJ
"In the year of our Lord..."
Monty Python used a lot of that in the movie Life of Brian