#! /bin/sh
# krah.sh
[ -z $1 ] && echo "Defaulting to $(date +%F)" && DATE=$(date +%F) || DATE="$1"

touch -d "$1" /tmp/OLD
touch -r /tmp/OLD -F 86400 /tmp/NEW
find . -name '*' -newer /tmp/OLD ! -newer /tmp/NEW ! -size 0

rm -f /tmp/OLD /tmp/NEW

./krah.sh YYYY-MM-DD

       -d, --date=STRING
              parse STRING and use it instead of current time

       -F, --forward=SECONDS
              Modify  the time by going forward SECONDS seconds.  For example,
              touch -r foo -F 5 bar will make the file  bar  5  seconds  newer
              than file foo.

       -r, --reference=FILE
              use this file's times instead of current time

       -newer file
              File was modified more recently than file.  -newer  is  affected
              by  -follow  only  if -follow comes before -newer on the command
              line.

       -size n[bckw]
              File uses n units of space.  The units are  512-byte  blocks  by
              default  or  if `b' follows n, bytes if `c' follows n, kilobytes
              if `k' follows n, or 2-byte words if `w' follows  n.   The  size
              does  not  count  indirect  blocks,  but it does count blocks in
              sparse files that are not actually allocated.