datepicker.css

.datepicker-background {
	position: fixed;
    width: 100%;
    height: 100%;
    background-color: rgba(0,0,0,0.5);
    top: 0;
    right: 0;
}

.datepicker-box {
	direction: rtl;
	width: 600px;
	height: 400px;

	position: fixed;
	top: 50%;
	right: 50%;
	transform: translate(50%, -50%);

	background-color: #fff;
	box-shadow:0 11px 15px -7px rgba(0,0,0,.2),0 24px 38px 3px rgba(0,0,0,.14),0 9px 46px 8px rgba(0,0,0,.12);
}

.datepicker-box .datepicker-box__header {
	background: #009688;
	width: 100%;
	height: 100%;
	text-align: center;
	color: #fff;
	display: inline-block;
	width: 40%;
}

.datepicker-box .datepicker-box__header table{
	width: 100%;
	height: 100%;
	text-align: center;
	color: #fff;
}

.datepicker-box .datepicker-box__header .datepicker-box__header__month {
    height: 20%;
    font-size: 48px;
    font-weight: 500;
}

.datepicker-box .datepicker-box__header .datepicker-box__header__day {
    height: 60%;
    font-size: 70px;
    font-weight: 900;
}

.datepicker-box .datepicker-box__header .datepicker-box__header__year {
	height: 20%;
    font-size: 40px;
    opacity: 0.8;
    font-weight: 500;
}

.datepicker-box__body {
	vertical-align: top;
	display: inline-block;
	width: 60%;
}

/*
 *	Navigation
 */

.datepicker-box__navigation {
	margin-top: .75em;
	text-align: center;
	height: 35px;
}

.datepicker-box__navigation .datepicker-box__navigation__month {
	font-weight: 500;
	font-size: 22px;
    margin-left: 10px;
}

.datepicker-box__navigation .datepicker-box__navigation__year {
	width: 100px;
    height: 30px;
    margin: 3px 0;
    background: transparent;
    border: solid 1px #e0e0e0;
    color: #212121;
    outline: none;
    	font-size: 18px;

}

.datepicker-box__navigation .datepicker-box__navigation__year option{
	font-size: 18px;
	line-height: 18px;
}

.datepicker-box .datepicker-box__navigation button {
	transition: background 0.5s;
	cursor: pointer;
	width: 50px;
	height: 35px;
    border: none;
    outline: none;
    background-color: transparent;
    border-radius: 4px 4px 4px 4px;
    font-size: 25px;
}

.datepicker-box .datepicker-box__navigation button:hover {
	background-color: rgba(0, 150, 136, 0.5);
}

.datepicker-box__navigation .datepicker-box__navigation__previous,
.datepicker-box__navigation .datepicker-box__navigation__next {
	font-size: 20px;
	line-height: 20px;
}

.datepicker-box .datepicker-box__navigation .datepicker-box__navigation__previous {
	border-top-right-radius: 0;
	border-bottom-right-radius: 0;
	float: right;
}

.datepicker-box .datepicker-box__navigation .datepicker-box__navigation__next {
	border-top-left-radius: 0;
	border-bottom-left-radius: 0;
	float: left;
}

.datepicker-box .datepicker-box__calender {
	position: absolute;
    height: calc(100% - 1.5em - 66px);
    width: calc(60% - 2rem);
	margin: 0 1rem;
}

.datepicker-box .datepicker-box__calender th,
.datepicker-box .datepicker-box__calender td {
	padding: 0;
	margin: 0;
	text-align: center;
}

.datepicker-box .datepicker-box__calender th {
	font-size: 22px;
    font-weight: 900;
}

.datepicker-box .datepicker-box__calender table {
	width: 100%;
	height: 100%;
}

.datepicker-box .datepicker-box__calender button.selected {
	background-color: #009688;
	border-radius: 50%;
	cursor: default;
	color: #fff;
}

.datepicker-box .datepicker-box__calender button.current {
	color: #009688;
}

.datepicker-box .datepicker-box__calender button {
	width: 40px;
    height: 40px;
    font-size: 26px;
	background-color: transparent;
	border: none;
	outline: none;
	cursor: pointer;
}

.datepicker-box .datepicker-box__actions {
	position: absolute;
    bottom: 1rem;
    width: calc(60% - 2rem);
	padding: 0 1rem;
}

.datepicker-box .datepicker-box__actions button {
	cursor: pointer;
	transition: background 0.5s;
	will-change: transform,opacity,background;
    -webkit-tap-highlight-color: transparent;
    -moz-osx-font-smoothing: grayscale;
    -webkit-font-smoothing: antialiased;
    font-size: 20px;
    font-weight: 500;
    letter-spacing: .04em;
    line-height: 2.25rem;
    text-decoration: none;
    text-transform: uppercase;
    color: rgba(0,0,0,.87);
    display: inline-block;
    position: relative;
    height: 36px;
    padding: 0 16px;
    border: none;
    border-radius: 4px;
    -webkit-box-sizing: border-box;
    box-sizing: border-box;
    outline: none;
    background: transparent;
    text-align: center;
    overflow: hidden;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-appearance: none;
}

.datepicker-box .datepicker-box__actions .datepicker-box__actions__cancel {
	float: right;
	color: #F44336;
}

.datepicker-box .datepicker-box__actions .datepicker-box__actions__cancel:hover {
	background-color: rgba(244, 67, 54, 0.2);
}

.datepicker-box .datepicker-box__actions .datepicker-box__actions__today {
	float: left;
	color: #2196F3;
}

.datepicker-box .datepicker-box__actions .datepicker-box__actions__today:hover {
	background-color: rgba(33, 150, 243, 0.2);
}

.datepicker-box .datepicker-box__actions .datepicker-box__actions__save {
	float: left;
	color: #009688;
}
.datepicker-box .datepicker-box__actions .datepicker-box__actions__save:hover {
	background-color: rgba(0, 150, 136, 0.2);
}