Mtime

https://askubuntu.com/questions/589210/removing-files-older-than-7-days

find /path/to/ -type f -mtime +7 -name '*.gz' -execdir rm -- '{}' \;

See also

• find, find ., ls, findmnt, locate, -mindepth, -name, -delete
• file, File system, directory, touch, mkdir, ls, ln truncate, fallocate, split, stat, inode, File descriptor, superblock, block size (blockdev), fuser, lsof, scrub, chattr, ulimit (nofiles), cp, mv, file (command), mkfifo, chmod