.wpcf7-date {
    width: 100%;
}

.wpcf7-date:before {
    width: 100%;
    content: attr(placeholder);
}

.wpcf7-date:hover:before {
    width: 0%;
    content: "";
}

.wpcf7-date.bt-date-input-has-value:before {
    display: none;
}

.wpcf7-date.placeholderclass:before {
    width: 0%;
    content: "";
}