Simple script to iterate over range of dates

range.sh

#!/bin/bash
read -p "From: " from
read -p "To: " to

command='echo'

start=`date +"%Y-%m-%d" -d $from`
end=`date +"%Y-%m-%d" -d $to`

while [ "$start" != "$end" ] ; 
do 
    $command $start
    start=`date +"%Y-%m-%d" -d "$start + 1 day"`; 
done