@hebcal/hdate
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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_II: 13
    AV: 5
    CHESHVAN: 8
    ELUL: 6
    IYYAR: 2
    KISLEV: 9
    NISAN: 1
    SHVAT: 11
    SIVAN: 3
    TAMUZ: 4
    TEVET: 10
    TISHREI: 7