Originally Posted by
William W
What Manfred wrote: In your User Manual there’s certain to be a warning note in the “Date Time” Chapter, it will read something like ‘If you store the camera without the battery or if the battery becomes exhausted the date and time might be reset’. That's a standard warning for Canon EOS.
The Camera retains the ‘date/time’ memory for a short period of time without any Camera Battery, but not for a year.
Anyway, what I wanted to add was - when searching for an EXIF editor, consider searching for one that can edit in batches, if you have a lot of photos to change.
WW