<!--Important link source from https://bbbootstrap.com/snippets/green-themed-datepicker-date-range-54853616-->
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.9.0/css/bootstrap-datepicker.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.4.1/css/bootstrap.css">
<link rel="stylesheet" href="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/2.3.2/css/bootstrap-responsive.css">
<script src="https://cdnjs.cloudflare.com/ajax/libs/jquery/3.4.1/jquery.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/bootstrap-datepicker/1.9.0/js/bootstrap-datepicker.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/twitter-bootstrap/4.4.1/js/bootstrap.js"></script>
<div class="container px-1 px-sm-5 mx-auto">
    <form autocomplete="off">
        <div class="flex-row d-flex justify-content-center">
            <div class="col-lg-6 col-11">
                <div class="input-group input-daterange"> <input type="text" class="form-control input1" placeholder="Start Date" readonly> <input type="text" class="form-control input2" placeholder="End Date" readonly> </div>
            </div>
        </div>
    </form>
</div>
body {
    color: #000;
    overflow-x: hidden;
    height: 100%;
    background-color: #66BB6A !important;
    background-repeat: no-repeat
}

.container {
    padding-top: 120px;
    padding-bottom: 120px
}

input {
    padding: 30px 15px !important;
    border: 1px solid lightgrey !important;
    border-radius: 10px;
    box-sizing: border-box;
    background-color: #fff !important;
    color: #4CAF50 !important;
    font-size: 18px !important;
    letter-spacing: 1px;
    position: relative;
    font-weight: bold !important
}

.input1 {
    text-align: left !important
}

.input2 {
    text-align: right !important
}

input:focus {
    -moz-box-shadow: none !important;
    -webkit-box-shadow: none !important;
    box-shadow: none !important;
    border: 1px solid #512DA8;
    outline-width: 0
}

::placeholder {
    color: #BDBDBD;
    opacity: 1
}

:-ms-input-placeholder {
    color: #BDBDBD
}

::-ms-input-placeholder {
    color: #BDBDBD
}

button:focus {
    -moz-box-shadow: none !important;
    -webkit-box-shadow: none !important;
    box-shadow: none !important;
    outline-width: 0
}

.datepicker {
    background-color: #fff;
    border-radius: 0 !important;
    padding: 15px 20px !important;
    align-content: center !important
}

.datepicker-dropdown {
    top: 0;
    left: calc(50% - 161px) !important
}

.datepicker-dropdown.datepicker-orient-left:before {
    left: calc(50% - 6px) !important
}

.datepicker-dropdown.datepicker-orient-left:after {
    left: calc(50% - 5px) !important
}

.datepicker table tr td.today,
span.focused {
    border-radius: 50% !important;
    background-image: linear-gradient(#FFF3E0, #FFE0B2)
}

.datepicker table tr td.today.range {
    background-image: linear-gradient(#eeeeee, #eeeeee) !important;
    border-radius: 0 !important
}

thead tr:nth-child(3) th {
    font-weight: bold !important;
    padding-top: 10px;
    padding-bottom: 10px
}

.old,
.day,
.new {
    width: 40px !important;
    height: 40px !important;
    border-radius: 0px !important;
    border: 1px solid lightgrey !important
}

.day.old,
.day.new {
    background-color: #F5F5F5 !important;
    color: #E0E0E0 !important
}

.day.old:hover,
.day.new:hover {
    border-radius: 0px !important
}

.old-day:hover,
.day:hover,
.new-day:hover,
.month:hover,
.year:hover,
.decade:hover,
.century:hover {
    border-radius: 50% !important;
    background-color: #eee
}

.active {
    border-radius: 50% !important;
    background-image: linear-gradient(#90CAF9, #64B5F6) !important;
    color: #fff !important
}

.range-start,
.range-end {
    border-radius: 50% !important;
    background-image: linear-gradient(#4CAF50, #4CAF50) !important
}

.range {
    color: #4CAF50 !important
}

.prev,
.next,
.datepicker-switch {
    border-radius: 0 !important;
    padding: 10px 10px 10px 10px !important;
    font-size: 18px;
    opacity: 0.7;
    color: #4CAF50
}

.prev:hover,
.next:hover,
.datepicker-switch:hover {
    background-color: inherit !important;
    opacity: 1
}

@media screen and (max-width: 500px) {
    .datepicker-dropdown.datepicker-orient-right:before {
        right: calc(50% - 6px) !important
    }

    .datepicker-dropdown.datepicker-orient-right:after {
        right: calc(50% - 5px) !important
    }
}
$(document).ready(function(){

$('.input-daterange').datepicker({
format: 'dd-mm-yyyy',
autoclose: true
});

});

External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

This Pen doesn't use any external JavaScript resources.