.append_test {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 99999;
    padding: 0;
    height: 44px;
    width: 100%;
}

.dropdown-menu_datatime{
    padding: 10px;
    border-radius: 0;
    margin: 0;
    border: 0;
    width: 100%;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
}