The date of the opening scene is established as Tuesday, September 12, 1916 as shown in the close-up of the newspapers bought by the character John Keyes; however, the large calendar displayed in the hotel lobby shows the date as being the 20th.
When John Keyes buys the second newspaper, he opens it, flips through it and directs his attention to an article in a spot midway down an interior page. The insert shot of the article, however, includes the full banner and masthead, indicating that it is of the upper right front page.