#ui-datepicker-div {
    width: 260px;
    font-size: 18px;
    text-align: center;
    background: #fff;
}

.ui-datepicker-calendar tr td a {
    text-align: center !important;
    border-radius: 4px;
    background: none;
    border: none !important;
}

.ui-datepicker-div { background: #fff;}