script.
    function initMourn() {
        const date = new Date();
        const today = (date.getMonth() + 1) + "-" + date.getDate()
        const mourn_days = !{JSON.stringify(theme.mourn.days)}
        if (mourn_days.includes(today)) {
            document.documentElement.style.filter = "grayscale(1)";
        }}
    initMourn();