Exiftool has an -alldates parameter:

exiftool -alldates-=24 -filemodifydate-=24 -filecreatedate-=24   *.jpg

The above code works to subtract 24 hours according to this Forum comment (by Phil Harvey):

https://exiftool.org/forum/index.php?topic=6330.msg31354#msg31354

You can combine the above code ( after making backups! ), with the option  -overwrite_original_in_place, inserted directly after the call to exiftool.

Note, an earlier revision of this post suggested using the -globalTimeShift parameter, as in:

exiftool -globalTimeShift -24 -time:all  *.jpg

However (according to Phil Harvey), "The -globalTimeShift option is needed only when you want to copy a shifted date/time value to another tag.", such as a -geo tag. See:

https://exiftool.org/forum/index.php?topic=9224.msg47655#msg47655
https://exiftool.org/forum/index.php?topic=6330.msg31354#msg31354

https://exiftool.org/exiftool_pod.html
https://exiftool.org/

Exiftool has an -alldates parameter:

exiftool -alldates-=24 -filemodifydate-=24 -filecreatedate-=24   *.jpg

The above code works to subtract 24 hours according to this Forum comment (by Phil Harvey):

https://exiftool.org/forum/index.php?topic=6330.msg31354#msg31354

You can combine the above code with an -out file specification, like -out ./newJPG.jpg or (in a new directory), with -out ./newdir/newJPG.jpg. The -out specification gets inserted directly after the call to exiftool.

You can also try adding to the -out file specification ( after making backups! ), the option-overwrite_original OR -overwrite_original_in_place, inserted directly after the call to exiftool. See exiftool --help for details.

Note, an earlier revision of this post suggested using the -globalTimeShift parameter, as in:

exiftool -globalTimeShift -24 -time:all  *.jpg

However (according to Phil Harvey), "The -globalTimeShift option is needed only when you want to copy a shifted date/time value to another tag.", such as a -geo tag. See:

https://exiftool.org/forum/index.php?topic=9224.msg47655#msg47655
https://exiftool.org/forum/index.php?topic=6330.msg31354#msg31354

https://exiftool.org/exiftool_pod.html
https://exiftool.org/

Exiftool has a -globalTimeShift parameter:

exiftool -globalTimeShift -24 -time:all  *.jpg

Above shifts all EXIF data back 24 hours. You can look at a recent EXIF question for hints on how to loop through (and save updated) files:

SED and REGEX for EXIF renaming
https://unix.stackexchange.com/a/674519/227738
https://exiftool.org/exiftool_pod.html
https://exiftool.org/

Exiftool has an -alldates parameter:

exiftool -alldates-=24 -filemodifydate-=24 -filecreatedate-=24   *.jpg

The above code works to subtract 24 hours according to this Forum comment (by Phil Harvey):

https://exiftool.org/forum/index.php?topic=6330.msg31354#msg31354

You can combine the above code ( after making backups! ), with the option -overwrite_original_in_place, inserted directly after the call to exiftool.

Note, an earlier revision of this post suggested using the -globalTimeShift parameter, as in:

exiftool -globalTimeShift -24 -time:all  *.jpg

However (according to Phil Harvey), "The -globalTimeShift option is needed only when you want to copy a shifted date/time value to another tag.", such as a -geo tag. See:

https://exiftool.org/forum/index.php?topic=9224.msg47655#msg47655
https://exiftool.org/forum/index.php?topic=6330.msg31354#msg31354

https://exiftool.org/exiftool_pod.html
https://exiftool.org/