Lass mich wissen wann du mich brauchst:<br>
 <form method="post" action="index.php">
  <label for="datum">Datum wählen (max. +8 Wochen):</label><br>

  <!-- Tag -->
  <select name="day" id="tag" required>
 <option value="01">01</option>
 <option value="02">02</option>
 <option value="03">03</option>
 <option value="04">04</option>
 <option value="05">05</option>
 <option value="06">06</option>
 <option value="07">07</option>
 <option value="08">08</option>
 <option value="09">09</option>
 <option value="10">10</option>
 <option value="11">11</option>
 <option value="12">12</option>
 <option value="13">13</option>
 <option value="14">14</option>
 <option value="15">15</option>
 <option value="16">16</option>
 <option value="17">17</option>
 <option value="18">18</option>
 <option value="19">19</option>
 <option value="20">20</option>
 <option value="21">21</option>
 <option value="22">22</option>
 <option value="23">23</option>
 <option value="24">24</option>
 <option value="25">25</option>
 <option value="26">26</option>
 <option value="27">27</option>
 <option value="28">28</option>
 <option value="29">29</option>
 <option value="30">30</option>
 <option value="31">31</option>
</select>

  <!-- Monat -->
  <select name="month" id="monat" required><option value="12">December</option>
<option value="1">January</option>
<option value="2">February</option>
</select>

  <!-- Jahr -->
  <select name="year" id="jahr" required>
<option value="2025">2025</option>
<option value="2026">2026</option>
</select>

  <br><br>

  <input type="submit" value="Nachschlagen !">
 </form>