Coder Wrap provides free to use snippets

.dynamic-year {
    max-width: 500px !important;
    text-align: center;
    width: 100%;
    height: 300px;
    margin:auto;
    display: flex;
    flex-flow: row wrap;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    border: #ccc 1px solid;
    font-weight: 700;
    background-color: #e7e7e7;
}

var dynamicyear = new Date().getFullYear();
document.getElementById('dynamic_year').innerHTML = dynamicyear;