Loop Through Date Range in BASH

#!/bin/bash
######################################################################
#Copyright (C) 2021  Kris Occhipinti
#https://filmsbykris.com

#This program is free software: you can redistribute it and/or modify
#it under the terms of the GNU General Public License as published by
#the Free Software Foundation, either version 3 of the License, or
#(at your option) any later version.

#This program is distributed in the hope that it will be useful,
#but WITHOUT ANY WARRANTY; without even the implied warranty of
#MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
#GNU General Public License for more details.

#You should have received a copy of the GNU General Public License
#along with this program.  If not, see <http://www.gnu.org/licenses/>.
######################################################################

read -p "Enter Start Date: " d
d=$(date +%Y-%m-%d -d "$d")

read -p "Enter End Date: " end
end=$(date +%Y-%m-%d -d "$end")

while [ "$d" != "$end" ];
do
  echo $d
  d=$(date +%Y-%m-%d -d "$d + 1 day")

done