How to compare the modification date of a file with the current one?

Question

bash

It is required to generate a monthly report on changes in the working directory (files changed). It is necessary to check the file modification date, if it coincides with the current month, then the files have been modified.

Answer 1

stackoverflow.com/a/5289636
file modified date --> stackoverflow.com/a/4774377

Answer 2

find / -mtime -31 -print