JSFiddle - React, Tailwind, and code Playground

HTML

<div id="backGround0"></div>
                        <div id="dropspot0"></div>
                        <p class="ziua0">LUNI<br/>
<select id="zile0">
                            <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>
                 ...

JavaScript

var zile0 = $('#zile0').html();
$('#zile1').html(zile0);

var luniAn0 = $('#luniAn0').html();
$('#luniAn1').html(luniAn0);