By modification time:
find /path/to/find -newermt "TIMESTART" -not -newermt "TIMEEND"
Example:
find /home -newermt "2020-06-14 00:00:00" -not -newermt "2020-06-15 00:00:00"
By access time:
find /path/to/find -newerat "TIMESTART" -not -newerat "TIMEEND"
By change time:
find /path/to/find -newerct "TIMESTART" -not -newerct "TIMEEND"
Example: delete all mp4 files with access time older than 7 days:
a=$(date -d "7 days ago" "+%Y-%m-%d %H:%M:%S") && find /some/folder -iname "*.mp4" -not -newerat "$a"| xargs rm -f
Note: You can use more humane ways:
find /path -newermt "-24 hours"
find /path -newermt "1 day ago"
find /path -newermt "yesterday"
