Shell Programming and Scripting

#!/bin/ksh

isleapyr()
{
        year=$1
        if [[ $(( $year % 4 )) -eq  0 && $(( $year % 100 )) -ne 0  \
                          || $(( $year % 400 )) -eq 0 ]] ; then     
           echo 1                                                   
        else                          
           echo 0
        fi
}

days_in_a_month()
{
        month=$(( $1 - 1 ))
        start=0
        result=0

        if [[ $( isleapyr $2 ) -eq 1 ]] ; then
                set -A arr 31 29 31 30 31 30 31 31 30 31 30 31
        else
                set -A arr 31 28 31 30 31 30 31 31 30 31 30 31
        fi
        export mxdays=${arr[month]}
        
												
}
typeset -i thismonth
typeset -i today
typeset -i thisyear
date +"%d %m %Y" | read today thismonth thisyear
days_in_a_month $thismonth $thisyear 
if [[ $mxdays -eq $today ]] ; then
   echo "last DOM"
else
   echo "not last DOM"
fi

#!/bin/ksh

today=$(date +%d)
lastDay=$(echo $(cal) | awk '{print $NF}')

if [ "${today}" = "${lastDay}" ]; then
   echo 'Today is the LAST day of the month'
fi