1974 Charger build date 8th November 73 - door sticker 12-73?

[74ChargerSE440]

The build date on the tag is B08 (=8th November 73) - on the door sticker it says 12-73. Should this not be 11-73?

Is this a mistake, is my door sticker fake or is this inconsistency common?

 

[QuickBpBp]

Believe that is a scheduled production date verses the actual production date…

 

[70chall440]

I have no doubt that several people will jump on here to provide clarification but as I recall the date on the Tag is the scheduled build date whereas the door sticker is the actual build date (I could be backwards or completely wrong).