function vl_get_date_suffix(d) {
        switch(d) {
                case 1:
                case 21:
                        return 'st';
                case 2:
                case 22:
                        return 'nd';
                case 3:
                case 23:
                        return 'rd';
                default:
                        return 'th';
        }
}
function vl_get_date(julian_date=null) {
        const vl_zero_year = -4004;
        const vl_months = [
                {
                        key: 'ksh',
                        display: 'Kushim'
                },
                {
                        key: 'glg',
                        display: 'Gilgamesh'
                },
                {
                        key: 'mos',
                        display: 'Moses'
                },
                {
                        key: 'set',
                        display: 'Setanta'
                },
                {
                        key: 'khu',
                        display: 'Khutulun'
                },
                {
                        key: 'tzo',
                        display: 'Takezo'
                },
                {
                        key: 'lvl',
                        display: 'Lovelace'
                },
                {
                        key: 'bch',
                        display: 'Bach'
                },
                {
                        key: 'gha',
                        display: 'Ghandi'
                },
                {
                        key: 'klo',
                        display: 'Kahlo'
                },
                {
                        key: 'x',
                        display: 'X'
                },
                {
                        key: 'mrc',
                        display: 'Mercury'
                },
                {
                        key: 'svg',
                        display: 'Savage'
                }
        ];

        // flamboyance magnetism boldness rightness risk schemes stability
        // patience vengeance vision adaptability potential precision
        // devotion opportunism personas intensity skeptecism rationality
        // autonomy pride serenity vigilance wit efficiency spontaneity

        // kushim, // 3400 bc
        // gilgamesh, // 2800 bc
        // moses, // 2448 bc
        // cuchulainn, // ulster cycle, 1st century ad
        // musa, // 1280 ad // khutulun 1260ad
        // takezo, // 1584 ad
        // lovelace, // 1815 ad
        // beethoven, // 1823 ad
        // ghandi, // 1869 ad
        // kahlo, // 1907 ad
        // x, // 1925 ad
        // pele, // 1940 ad
        // mercury, // 1946 ad
        // savage, // 1952 ad

        const today = julian_date === null ? new Date() : new Date(julian_date.split('-')[0], julian_date.split('-')[1]-1, julian_date.split('-')[2]);
        const today_month = today.getMonth();
        const today_date = today.getDate();
        let today_year = today.getYear();

        console.info('new today', today_date, today_month, today_year);

        let leap = false;
        if(today_year < 2000) { today_year += 1900 }
        if((today_year % 4 == 0 && today_year % 100 !=0) || today_year % 400 == 0) { leap = true }
        const month_sum = new Array(0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334)
        let day_of_year = today_date + month_sum[today_month];
        if(leap && today_month > 1) { ++day_of_year }
        const vl_month = vl_months[parseInt((day_of_year+27)/28) - 1];
        const vl_weekdays = new Array("Sunday", "Monday", "Tuesday", "Wednesday", "Thursday", "Friday", "Saturday")
        const vl_weekday = vl_weekdays[day_of_year % 7];
        let vl_date = day_of_year % 28;
        if(vl_date == 0) { vl_date = 28 };
        const vl_year = today_year - vl_zero_year;
        let vl_cal;
        if(day_of_year < 365) {
                vl_cal = vl_weekday + ", " + vl_month.display + " " + vl_date + vl_get_date_suffix(vl_date) + ", " + vl_year + ".";
        }
        else {
                if(day_of_year >= 365) {
                        vl_cal = !leap ? "The Remainder, " + vl_year + "." : "The Remainder Supreme, " + vl_year + ".";
                };
        };
        console.debug('Date => julian:', today);
        console.debug('Date => julian_date:', today_date);
        console.debug('Date => julian_month:', today_month);
        console.debug('Date => julian_year:', today_year);
        console.debug('Date => julian_leap:', leap);
        console.debug('Date => day_of_year:', day_of_year);
        console.debug('Date => vl_weekday:', vl_weekday);
        console.debug('Date => vl_date:', vl_date);
        console.debug('Date => vl_month:', vl_month);
        console.debug('Date => vl_year:', vl_year);
        return vl_cal;
}

function vl_output_date(julian_date) {
        const date = vl_get_date(julian_date);
        const output = julian_date ? '<p>That day is:</p>' : '<p>Today is</p>';
        document.getElementById('output').innerHTML = output + '<h2>'+date+'</h2>';
}

vl_output_date();