Is it possible just to modify a date without change of size of the file?

[cjalamo]

Hi,

I'm changing the dates in the EXIF or CR2 files with

Code Select Expand

exiftool -alldates+='0:0:0 2:00:00' *.cr2

But I see that all the modified files are about 1MB smaller than the original ones.

Is there any way to modify only the date/time to have same size and only 1(or 2) byte (the +2 in the hours) difference between the original file and the changed one?
(Well really that value times 3, one for each date changed)

Thank you
C.

[wywh]

https://exiftool.org/faq.html#Q13