.datepicker.datepicker-dropdown.dropdown-menu {
    z-index: 999999999 !important;
}

.date-time-picker,
.date-picker {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 448 512'%3E%3Cpath d='M152 24c0-13.3-10.7-24-24-24s-24 10.7-24 24l0 40L64 64C28.7 64 0 92.7 0 128l0 16 0 48L0 448c0 35.3 28.7 64 64 64l320 0c35.3 0 64-28.7 64-64l0-256 0-48 0-16c0-35.3-28.7-64-64-64l-40 0 0-40c0-13.3-10.7-24-24-24s-24 10.7-24 24l0 40L152 64l0-40zM48 192l352 0 0 256c0 8.8-7.2 16-16 16L64 464c-8.8 0-16-7.2-16-16l0-256z' /%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right .75rem center;
    background-size: 15px 15px
}

.datepicker.datepicker-dropdown.dropdown-menu {
    z-index: 999999999 !important;
}