#!/bin/bash
#   determine day of week the 15th is for July for various years
LOG="day-of-the-week-15th-July.txt"
echo "the day of week the 15th occurs for July for these years" > $LOG
echo "=========================================================" >> $LOG
YEARS="1960 1961 1962 1963 1964 1965 1966 1967 1968 1969 1970"
for x in $YEARS
        do
        echo "Su Mo Tu We Th Fr Sa - $x"     >> $LOG
        cal 7 $x | grep 15                   >> $LOG
        done
echo "=========================================================" >> $LOG
     perl -pi -e 's$15$15$g' $LOG
     cat $LOG