A 12/12/12 date doesn't happen often. We checked the archive to see if people in Boston 100 years ago found the date as novel as people do today.
The only acknowledgement on 12/12/1912 was in an ad from Filene's, with a handwritten date. "TODAY is the first and only day in all your lifetime that may be written that way. Your children and your children's children will never be able to use that symbol as indicating a day in which they live."
The Globe mentioned the date the following day on the 13th of December. Since the 12th was yesterday's news, the Globe seemed to focus on the present, emphasizing the superstitious nature of the number 13.
"Kleptomaniacs who are doing their Christmas shoplifting early should make their hands behave today or the jail bells may ring out for them on Christmas morn," the article warned.