The calendar is a
lunar calendar with 12 months, each containing 29 or 30 days. Every four years, there is a
leap year, which adds a full month (30 days) to the Jewish year. The calendar combines the ancient calendars of
Alexandrian Jewry, the
Book of Jubilees, the
Book of Enoch, Abu Shaker's
Chronology, and the
Geʽez calendar. The years are counted according to the
Counting of Kushta: "1571 to Jesus Christ, 7071 to the
Gyptians and 6642 to the
Hebrews".
Jewish holidays by months: •
Nisan:
baʿāl lisan ('head of Nisan', or
New Year) on 1,
ṣomä fāsikā ('Passover fast', the
Fast of the Firstborn) on 14,
fāsikā (
Passover) 15–21, and
gadfat ('grow fat') or
buho ('fermented dough') on 22. •
Iyar: another
fāsikā (
Pesach Sheni) during 15–21. •
Sivan:
ṣomä mäʾrar ('harvest fast') on 11 and
mäʾrar ('harvest', or
Shavuot) on 12. •
Tammuz:
ṣomä tomos ('Tammuz fast') during 1–10. •
Av:
ṣomä ab ('Av fast') during 1–17. •
Shavuot: the fourth
Shabbat of the fifth month. •
Elul:
awd amet ('year rotate') on 1,
ṣomä lul ('Elul fast') during 1–9, ''anākel astar'i'' ('our atonement') on 10, and
asartu wasamantu ('eighteenth') on 28. •
Tishrei: ''ba'āl Matqe'' ('blowing holiday', or
Rosh Hashanah) on 1,
astasreyo ('day of atonement', or
Yom Kippur) on 10, and ''ba'āla maṣallat'' ('festival of booths', or
Sukkot) during 15–21. •
Cheshvan: a holiday for the day
Moses saw the
face of God on 1; a holiday for the reception of
Moses by the
Israelites on 10; a fast on 12; and
mehlella ('supplication', or
Sigd) on 29. •
Kislev: another ''ṣomä mã'rar
and mã'rar'' on 11 and 12, respectively. •
Tevet:
ṣomä tibt ('Tevet fast') during 1–10. •
Shevat:
wamashi brobu on 1. •
Adar:
ṣomä astēr (
Fast of Esther) during 11–13. Monthly holidays are mainly memorial days to a given annual holiday: • ''Yačaraqā ba'āl'' ('
Rosh Chodesh'), on the first day of every month •
Asärt ('ten') on the tenth day to commemorate Yom Kippur •
Asrä hulat ('twelve') on the twelfth day to commemorate Shavuot •
Asrä ammest ('fifteen') on the fifteenth day to commemorate Passover and Sukkot •
Somä mälěya: a fast on the last day of every month. Weekly holidays include the
ṣomä säňňo (Monday fast),
ṣomä amus (Thursday fast),
ṣomä ʿarb (Friday fast), and
Sanbat (
Shabbat). ==Monasticism==