Note the date in the photo caption of this Ottawa Citizen front page image from April 7:

Here's the resulting correction that ran Sunday:

RMS Titanic struck an iceberg and sank in the Atlantic Ocean in 1912. An incorrect date appeared in Saturday's Citizen.

The full front page with the photo (click for larger):

Thanks for Garey Ris for pointing this out.
Related: How The New York Times invented disaster coverage with Titanic sinking (Poynter)