How to delete files recursively and conditionally using the command line?

Question

linux

How can I delete all files in a folder and all its subfolders, provided that the modification date of the file is no later than the given date, and the file extension is not equal to the given type?

Answer 1

find /path/to/dir/ -type f -newermt "1970-01-01 00:00:00" ! -name "*.type" -ls -delete