Finding files modified since a certain time

To find files in the current and its subdirectories that were modified since 1 day ago:

find . -mtime -1 -print

To find files in the current and its subdirectories that were modified since 1 week (7 days) ago:

find . -mtime -7 -print

References: http://www.mydigitallife.info/2006/01/19/find-files-that-are-modified-today-or-since-certain-time-ago-in-unix/