JSFiddle - React, Tailwind, and code Playground

HTML

<div id="anons">ANONS

<div id="n">
Открытие<span>2</span>.09.12 г.
</div>

<div id="a">
Открытие<span>0</span>.09.12 г.
</div>

</div>



<div id="zavtra">ZAVTRA 
</div>

JavaScript

var date = new Date;
var d = date.getDate(); // 1
var zd = d+1;


var a = document.getElementById('anons');
var z = document.getElementById('zavtra');
var anonsChildren = a.children;

for(var i=0;i<anonsChildren.length;i++) {
    var date_open = anonsChildren[i].children[0].innerHTML;
    if(zd==date_open) perenos();

//[КРАСНЫЙ КОД]
    if(d>date_open) delete();
//[/КОД]
}





function perenos() {
    z.appendChild(anonsChildren[i]);
}

//[КРАСНЫЙ КОД]
function delete() {
    z.removeChild(anonsChildren[i]);
    a.removeChild(anonsChildren[i]);
}
    //[/КОД]