Canon PowerShot SX400 IS Black Manual (en)

As you take shots, the camera 
adds the shooting date or time to 
the lower-right corner of images.
To restore the original setting, 
choose [Off] in step 1.
Date stamps cannot be edited or removed.
Shots taken without adding a date stamp can be printed with one 
as follows.  
However, adding a date stamp this way to images that already 
have one may cause it to be printed twice.
Use camera DPOF print settings (
Use the software downloaded from the Canon website