The meaning of 08 /15 is not "everything is normal".
It is true that the origin of the expression goes back to a WW I machine gun. However, the modern meaning of the expression is "to be average", or even less than average, and originates from a novel by Hans Helmut Kirst, a former officer of the Wehrmacht.
The novel (actually 3 books, a trilogy) describes the suffering of common soldiers in war:
QUOTE
Was sind wir schon? Wir und einige hunderttausend andere werfen sich in den Dreck, wenn es uns befohlen wird
Translation: What are we then? We and several hundered thousand throw ourselves into the dirt when ordered to do so.
The titles of the 3 books are
- 08/15 in der Kaserne
- 08/15 im Krieg
- 08/15 bis zum Ende
and their main character is "Gefreiter Asch" (meanig "Arsch" - arse, the "r" was left away) and was boycotted in 1954 by many bookstores, since it didn't fit well into the politics of the time - the German army had just been re-established under its new name: Bundeswehr.