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 $ find . -type d -newermt "2019-01-01" \! -newermt "2019-02-01" -exec ls -ld {} \;

May 20, 2019, 6:48 p.m.fenchu

Explanation

List all directories that was modified in january (between 2019-01-01 and up til, but not included 2019-02-01).