function tryCelebrate() {
    const today = new Date();
    const date = [today.getMonth() + 1, today.getDate()]
    switch ((today.getMonth() + 1) * 100 + today.getDate()) {
        case 831: return startCelebrations('🎂', '.miku', 90);
        case 1225: return startCelebrations('🎄', '.miku', 90);
    }

    const isMilestone = MIKUS.features.length % 500 === 0;
    if (isMilestone) {
        let f = startCelebrations('🎉', '#count', 270)
        count.onclick = count.onmouseover = f;
        return;
    }
}
function startCelebrations(emoji, selector, angle) {
    function xy(elem) {

        let vw = Math.max(document.documentElement.clientWidth || 0, window.innerWidth || 0)
        let vh = Math.max(document.documentElement.clientHeight || 0, window.innerHeight || 0)
        let { x, y } = elem.getBoundingClientRect()

        return { 'x': x / vw, 'y': y / vh };
    }

    let cake = $('a')
    cake.innerText = emoji
    cake.style = 'cursor: pointer'
    cake.title = "happy birthday miku!"
    const title = document.getElementById('title')
    title.appendChild($space())
    title.appendChild(cake)

    let confettisrc = $('script')
    confettisrc.src = "https://cdn.jsdelivr.net/npm/canvas-confetti@1.9.3/dist/confetti.browser.min.js";
    document.body.appendChild(confettisrc)


    let N = 0;


    cake.onclick = () => {
        let element = document.querySelector(selector);
        if (!element) return;
        N += 1;
        let colors = N % 10 ? ['#3dbdd5'] : undefined;
        let count = N % 10 ? 20 : 100;

        let m = showcaseMiku ? showcaseMiku.properties : {};
        if (m.name === "Brazil") {
            count = 100;
            colors = [
                '#009B3A',
                '#FEDF00',
                '#002776'
            ]
        }
        confetti({
            'origin': xy(element),
            'angle': angle,
            'spread': 140,
            'particleCount': 100,
            'ticks': 100,
            'gravity': 0.3,
            'colors': colors,
            'shapes': ['square'],
            'disableForReducedMotion': true,
        });
    }
    return cake.onclick;
}