datePicker.css

/* --------- date picker --------- */
.date-picker {
	position: absolute;

    font-size: 1em;
    color: #CCC;
    text-align: center;
    cursor: default;

	border: 1px solid #444;
    border-radius: 2px;
	margin: 6px 0;
	background: #222;
	box-shadow: 8px 8px 12px rgba(0, 0, 0, 0.2);
}
.date-picker:before {
	content: "";
    display: block;
    position: absolute;
    top: -9px;
    left: 8px;
    border: 8px solid #444;
    border-width: 0px 8px 8px;
    border-color: transparent transparent #444;
}
.date-picker:after {
	content: "";
    display: block;
    position: absolute;
    top: -8px;
    left: 8px;
    border: 8px solid #222;
    border-width: 0px 8px 8px;
    border-color: transparent transparent #333;
}
.date-picker .cal-month {
	margin: 0;
}

/* ------ months, rendering from calendar.js ------ */
/* ------ I'm shure you can do better ;o)    ------ */
.cal-month {
    border-collapse: collapse;
    margin: 0 12px 12px 0;
}
.cal-month td {
    z-index: 0;
}
.week-day {
    font-weight: normal;
    border-bottom: 1px solid #666;
    color: #777;
}
.previous-month, .next-month, .current-month, .week-no, .week-day {
    position: relative;
    padding: 5px 7px;
    cursor: default;
}

.previous-month:not(.disabled):hover:before,
.next-month:not(.disabled):hover:before,
.current-month:not(.disabled):hover:before,
.current-month.today:after,
.event:before,
.selected-day:before,
.previous-month:active:before,
.next-month:active:before,
.current-month:active:before {
    content: '';
    display: block;
    position: absolute;
    top: 50%;
    left: 50%;
    margin: -14px;
    width: 28px;
    height: 28px;
    box-sizing: border-box;

    background-color: rgba(255, 255, 255, .1);
    border-radius: 50%;
    z-index: -1;
}
.event:before,
.selected-day:before,
.previous-month:active:before,
.next-month:active:before,
.current-month:active:before {
    background-color: #2e2e2e;
}
.selected-day:before,
.previous-month:active:before,
.next-month:active:before,
.current-month:active:before {
    border: 1px solid #C44;
}

.previous-month, .next-month {
    color: #444;
}
.week-no {
    color: #C44;
    border-right: 1px solid #666;
    width: 30px;
    padding: 4px 0;
}
.current-month.today:after {
    border: 1px solid rgba(255, 255, 255, 0.4);
    background-color: transparent;
}

.previous-month.week-end, .next-month.week-end {
    color: #422;
}

.week-end, .week-day.week-end {
    color: #633;
}
.event {
    color: #C44!important;
}
.previous-month.event:before, .next-month.event:before {
    background-color: #322;
}
.disabled  {
    color: #111!important;
}

/* ------ the UI for the picker (next, prev, month, year and time) ------ */
.dp-title, .dp-footer {
    padding: 5px 5px 6px;

    background: #333;
    border-radius: 0 0 2px 2px;
}
.dp-title {
	min-width: 180px;
    border-radius: 2px 2px 0 0;
}
.dp-label {
    position: relative;
    display: inline-block;
    overflow: hidden;
	margin: 0 2px -5px;
}
.dp-label-month {
    /*font-weight: bold;*/
}
.dp-label-year {
    color: #999;
}
.dp-label:hover {
    color: #FFF;
}
.dp-title select, .dp-footer select {
    display: inline-block;
    position: absolute;
    left: 0; /* cover text but... */
    top: 0;
    opacity: 0; /* ...make other text visible */
}
.dp-prev, .dp-next {
	display: block;
    position: relative;
    outline: none;

    width: 20px;
    height: 22px;
    margin: 0 -3px;
    text-indent: 20px;
    white-space: nowrap;
    overflow: hidden;
    background-color: transparent;
    border: none;

    opacity: .5;
	float: left;
}
.dp-next {
    float: right;
}
.dp-prev:after, .dp-next:after {
	content: "";
	position: absolute;
	top: 50%;
	left: 50%;
	width: 0px;
	height: 0px;
	margin: -6px;

	border: 6px solid #fff;
}
.dp-prev[disabled]:after, .dp-next[disabled]:after {
	visibility: hidden;
}

.dp-prev:after {
	border-color: transparent #fff transparent transparent;
}
.dp-next:after {
	border-color: transparent transparent transparent #fff;
}
.dp-prev:hover, .dp-next:hover {
	opacity: 1;
}