JSFiddle - React, Tailwind, and code Playground

HTML

<div class="circle" id="date">99</div>

CSS

.circle {
    width: 300px;
    height: 300px;
    margin-top: 20px;
    margin-left: 20px;
    border-radius: 50%;
    font-size: 200px;
    color: #fff;
    line-height: 300px;
    text-align: center;
    background: #000;
}