Date check won't let me send the form :-(

See Date Field

thanks for the link but this doesn’t solve the problem …

Refer https://contactform7.com/date-field/ – DD-MM-YYYY format is clearly not supported.
?
?There is the Contact Form 7 Datepicker plugin but this is often reported as not working after CF7 updates.

So, i tried
add_filter( 'wpcf7_support_html5', '__return_false' );
and
add_filter( 'wpcf7_support_html5', '__return_false' );

but both don’t work ??

i still geht the error dialog “could not send”
i checked it with the error messages and this dialog appears if the error is “The sender’s message could not be sent.”
but its correct! i checked it 3x …
i even set some real email accounts not only …

Here my settings:

<p style="font-size:11px;">* = Pflichfeld</p>

<p>Ihr Name (*)<br />
[text* text-name placeholder "Name"]</p>

<p>Ihre E-Mail-Adresse (*)<br />
[email* email-mail placeholder "E-Mail"]</p>

<p>Betreff<br />
[text text-subject placeholder "Betreff"]</p>

<p>Tag der Maifeier (*)<br />
[text* text-datum 20/ placeholder "tt.mm.jjjj"] um [text text-uhrzeit 15/ placeholder "hh:mm"]

<p>Wo ist die Maifeier (*)<br />
[text* text-wo placeholder "Ort"] <br>
[text* text-landkreis placeholder "Landkreis"]</p>

<p>Was ist geboten?<br />
[textarea text-was placeholder "Rahmenprogramm, Kapellen, Aufführungen, Bars, DJs, Bands ..."]</p>

<p>Veranstalter<br />
[text text-veranstalter placeholder "Veranstalter"]</p>

<p>Webseite vom Veranstalter: <br>[url url-veranstalter placeholder "Veranstalter-Webseite"]<br>
Facebookseite vom Veranstalter: <br>[url url-facebook placeholder "Veranstalter-Facebookseite"]<br>
Facebook-Eventseite: <br>[url url-event placeholder "Facebook-Eventseite"]<br>

<p>Spam-Sicherheitsfrage (*)<br />
[quiz quiz-618 10/2 "5+3= |3" "12-4= |8" "3x3= |9" "8+5= |13" "7x2= |14"]</p>

<p style="padding:30px 0 30px 0;">[submit "Abschicken"]</p>

and the mail settings:

E-Mail:
to: [email protected]
from: [email-mail]
subject: [text-subject]
Additional Headers: Reply-To: [email-mail]

E-Mail 2:
to: [email-mail]
from: [email protected]
subject: Mail erhalten
Additional Headers: Reply-To: [email protected]

Hi, I find a similar problem with firefox, in a date field don’t appears the month selection, i don’t find this problem with Chrome.
When subimt the form there is a date field error.

i’ve the same problem, do you have a issue ?

thanks a lot