@hebcal/core
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    Enumeration monthsReadonly

    Hebrew months of the year (NISAN=1, TISHREI=7).

    Months are numbered from Nisan, the first month of the ecclesiastical year, even though the civil year begins with Tishrei on Rosh Hashanah (see HDate.getTishreiMonth for Tishrei-based numbering).

    In a common year month 12 is Adar; in a leap year month 12 is Adar I and month 13 is Adar II.

    import {months, getMonthName} from '@hebcal/hdate';
    months.TISHREI; // 7
    getMonthName(months.ADAR_I, 5784); // 'Adar I' (5784 is a leap year)
    getMonthName(months.ADAR_I, 5783); // 'Adar'
    Index
    ADAR_I: 12

    Adar or Adar Rishon / אדר

    ADAR_II: 13

    Adar Sheini (only on leap years) / אדר ב׳

    AV: 5

    Av / אב

    CHESHVAN: 8

    Cheshvan / חשון

    ELUL: 6

    Elul / אלול

    IYYAR: 2

    Iyyar / אייר

    KISLEV: 9

    Kislev / כסלו

    NISAN: 1

    Nissan / ניסן

    SHVAT: 11

    Sh'vat / שבט

    SIVAN: 3

    Sivan / סיון

    TAMUZ: 4

    Tamuz (sometimes Tammuz) / תמוז

    TEVET: 10

    Tevet / טבת

    TISHREI: 7

    Tishrei / תִּשְׁרֵי