Being given a DVD of photos, I ran my exifsort script to sort the images into date stamped folders and found the camera that had taken the pictures had the year set to 2026.
I came accross a handy utility to modify the EXIF timestamp of the images called exiv2 at www.exiv2.org. Unfortunately Debians repository is horribly out of date, so I grabbed the source from their site.
I began with a ./configure and came accross this error:
configure: error: either specify a valid expat installation with --with-expat=DIR or disable XMP support with --disable-xmp
It was easily fixed by installing the libexpat1-dev package,
apt-get install libexpat1-dev
Exiv2 compiled nicely after that.