setfile

Set file attributes on files in an HFS+ directory. More information: https://ss64.com/osx/setfile.html.

Set creation date for specific files:

setfile -d "{{MM/DD/YYYY HH:MM:SS}}" {{path/to/file1 path/to/file2 ...}}

Set modification date for specific files:

setfile -m "{{MM/DD/YYYY HH:MM:SS}}" {{path/to/file1 path/to/file2 ...}}

Set modification date for symlink file (not to linked file itself):

setfile -P -m "{{MM/DD/YYYY HH:MM:SS}}" {{path/to/file1 path/to/file2 ...}}