Would surprise me if he then claimed a year “zero” and made it 2012.
But then, he thinks Jesus is Michael the Archangel which is a somewhat-often-seen error as well.
Well, Michael means ‘one who is like God’, which is another way of saying, ‘is’.
Archangel means ‘the main messenger.
It’s not unreasonable with that interpretation to say that it isn’t wrong.
Just think, they can leave all the old posters up and just stamp the revised month over the old one. Think of all the money that would save!