#!/bin/bash
# This script will test if we're in a leap year or not.
year=`date +%Y`
if [ $[$year % 400] ?eq "0" ]; then
echo "This is a leap year. February has 29 days."
elif [ $[$year % 4] ?eq 0 ]; then
if [ $[$year % 100] ?ne 0 ]; then
echo "This is a leap year, February has 29 days."
else
echo "This is not a leap year. February has 28 days."
fi
else
echo "This is not a leap year. February has 28 days."
fi