#! /bin/ksh

if [[ $(date +%H) -eq 01 ]] ; then
  echo "Judgement day has arrived"   # run the script
else
  echo "Judgement day has not arrived"
fi

#! /bin/ksh
#
#

case $# in
    2) start=$1; end=$2 ;;
    *) echo "Need a start and end time"; exit 1;;
esac

now=$(date +%H)
if [[ $now -ge $start && $now -lt $end ]] ;
then
    echo "Judgement Day has arrived."
else
    echo "Judgement Dat yet to arrive."
fi;