@hebcal/core/dist/esm/modern.js

A perpetual Jewish Calendar API

/*! @hebcal/core v5.10.1, distributed under GPLv2 https://www.gnu.org/licenses/gpl-2.0.txt */
import { months, HDate } from '@hebcal/hdate';

const SUN = 0;
const TUE = 2;
const FRI = 5;
const SAT = 6;
const NISAN = months.NISAN;
const IYYAR = months.IYYAR;
/**
 * Yom HaShoah first observed in 1951.
 * When the actual date of Yom Hashoah falls on a Friday, the
 * state of Israel observes Yom Hashoah on the preceding
 * Thursday. When it falls on a Sunday, Yom Hashoah is observed
 * on the following Monday.
 * http://www.ushmm.org/remembrance/dor/calendar/
 * @private
 * @param year
 */
function dateYomHaShoah(year) {
    if (year < 5711) {
        return null;
    }
    let nisan27dt = new HDate(27, NISAN, year);
    if (nisan27dt.getDay() === FRI) {
        nisan27dt = new HDate(26, NISAN, year);
    }
    else if (nisan27dt.getDay() === SUN) {
        nisan27dt = new HDate(28, NISAN, year);
    }
    return nisan27dt;
}
/**
 * Yom HaAtzma'ut only celebrated after 1948
 * @private
 * @param year
 */
function dateYomHaZikaron(year) {
    if (year < 5708) {
        return null;
    }
    let day;
    const pesach = new HDate(15, NISAN, year);
    const pdow = pesach.getDay();
    if (pdow === SUN) {
        day = 2;
    }
    else if (pdow === SAT) {
        day = 3;
    }
    else if (year < 5764) {
        day = 4;
    }
    else if (pdow === TUE) {
        day = 5;
    }
    else {
        day = 4;
    }
    return new HDate(day, IYYAR, year);
}

export { dateYomHaShoah, dateYomHaZikaron };
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