Jewish calendar, Hebrew calendar

(Judaism) the calendar used by the Jews; dates from 3761 BC (the assumed date of the creation of the world); a lunar year of 354 days is adjusted to the solar year by periodic leap years

• lunisolar calendar — a calendar based on both lunar and solar cycles

• Tishri — the first month of the civil year; the seventh month of the ecclesiastical year in the Jewish calendar (in September and October)
• Heshvan — the second month of the civil year; the eighth month of the ecclesiastical year in the Jewish calendar (in October and November)
• Kislev, Chislev — the third month of the civil year; the ninth month of the ecclesiastical year in the Jewish calendar (in November and December)
• Tebet, Tevet — the fourth month of the civil year; the tenth month of the ecclesiastical year (in December and January)
• Shebat, Shevat — the fifth month of the civil year: the eleventh month of the ecclesiastical year in the Jewish calendar (in January and February)
• Adar — the sixth month of the civil year; the twelfth month of the ecclesiastic year in the Jewish calendar (in February and March)
• Veadar, Adar Sheni — included seven times in every 19 years
• Nisan, Nissan — the seventh month of the civil year; the first month of the ecclesiastic year (in March and April)
• Iyar, Iyyar — the eighth month of the civil year; the second month of the ecclesiastical year (in April and May)
• Sivan, Siwan — the ninth month of the civil year; the third month of the ecclesiastical year in the Jewish calendar (in May and June)
• Tammuz, Thammuz — the tenth month of the civil year; the fourth month of the ecclesiastic year (in June and July)
• Ab, Av — the eleventh month of the civil year; the fifth month of the ecclesiastical year in the Jewish calendar (in July and August)
• Elul, Ellul — the twelfth month of the civil year; the sixth month of the ecclesiastical year in the Jewish calendar (in August and September)