progress-bar.js

function calculateSecondsBetweenDates(date1, date2) {
    const timestamp1 = date1.getTime();
    const timestamp2 = date2.getTime();
    const differenceInMilliseconds = Math.abs(timestamp2 - timestamp1);
    const differenceInSeconds = Math.floor(differenceInMilliseconds / 1000);
    return differenceInSeconds;
}

const staticDate = new Date('2025-01-01T00:00:00');

function logTimeDifference() {
    const currentDate = new Date();
    const secondsBetween = calculateSecondsBetweenDates(staticDate, currentDate);
    const yearPercentage = (secondsBetween / 31536000) * 100;
    const yearPercentageRounded = yearPercentage.toFixed(6);
    //console.log(yearPercentageRounded);
    document.getElementById("yearPercent").innerHTML = ("Currently " + yearPercentageRounded + "% through 2025");
    document.getElementById("progressBarFill").style.width = yearPercentageRounded + "%";
    const secondsLeft = 31536000 - secondsBetween;
    const minutesLeft = (secondsLeft / 60).toFixed(1);
    const hoursLeft = (secondsLeft / 3600).toFixed(1);
    const daysLeft = (secondsLeft / 86400).toFixed(1);

    document.getElementById("seconds-elapsed").innerHTML = "Time Left of 2025: " + "<br>" + 
        "in seconds: " + secondsLeft + "<br>" + 
        "in minutes: " + minutesLeft + "<br>" + 
        "in hours: " + hoursLeft + "<br>" + 
        "in days: " + daysLeft;
}

logTimeDifference()
setInterval(logTimeDifference, 1000);