JSFiddle - React, Tailwind, and code Playground

JavaScript

function foo() {
    var day = new Date().getDay();
    var hours = new Date().getHours();

    document.write('day: ' + day + '  Hours : ' + hours + '</br>');

    if (day === 0 && hours > 12 && hours < 13){}
    // Do what you want here:
}

setInterval(foo, 1000);