Linux: list out only files newer than some data

Test

#set timestamp for file    touch --date "2011-12-31" /tmp/foo# Find files newer than 2011/Dec/31, in /some/filesfind /some/files -newer /tmp/foo

Use find command with mtime arguments:  Some examples are here or here
For example, list files changed in last 7 days...
find / -type f -mtime -7