output.txt
# this would save the output from the status unix command in output.txt
status unix > ~/tmp/output.txt
rm -f output.txt
# puts the file in a tmp folder and then delets when done
stat ouput.txt | grep Modify | sed 's/^Modify: //g'

date -d "$(stat output.txt | grep Modify | sed 's/^Modify: //g')" +%s
# how old the file is in sec from the start of time
ftime=`date -d "$(stat output.txt | grep Modify | sed 's/^Modify: //g')" +%s`
# saves the time in a file called ftime
ctime=`date +%s`
let dtime=$ctime-$ftime
echo $dtime
time command
# shows the amount of time to run the command

at 531pm
# runs the command at 531pm
cron/crontab