Well they're probably talking about 11:59 PM on the 17th, or 12:00 AM on the 18th.
That extra minute makes all the difference 
It does? Like you won't even be able to get through the opening music in one minute. Heck if you get to make your Inquisitor before entering the game (as with Origins), you won't even be in the actual game yet by that minute.
It takes me the better part of an hour just making my Sim's 'just so'. I don't want to think about how long Inquisition's CC is going to take me... 
And I was terrible. I'd make a Warden or Hawke, and I wouldn't even be out of the first cutscene before I thought OMG I hate that tattoo/brows/makeup...you name it and cringe, hitting Esc button to delete and remake. Toolset usage cut that down a lot in Origins and knowing I could take Hawke at the first opportunity to The Emporium's mirror also helped, but more than a few ended up on the 'cutting room floor' for one flaw or another my OCD couldn't live with.