1) The major festivals are from the Torah (from God). See Leviticus ch.23. This includes Shabbat, Passover, Shavuot, Sukkot, Rosh Hashanah, and Yom Kippur. Rosh Hodesh (first day of each month - a minor occasion) is also from the Torah (Numbers ch.28).
Purim is from the Prophets (Esther ch.9), as are the fast days other than Yom Kippur (see Zechariah ch.8, and Talmud Rosh Hashanah 18b).
Hanukkah was instituted by the Sages after the sealing of the Hebrew Bible canon (see Talmud, Shabbat 21b).
See the attached Related Links.
The Mating Season......................................................?
Rosh Hashanah and Yom Kippur.
It originated in the Jewish religion.
Groban is a Jewish name.
Christian answer:Jesus celebrated all the Jewish festivals, so if you truly want to imitate the son of God it wouldn't hurt. Many Jewish festivals foreshadow the arrival of the Messiah, so by celebrating these festivals you are celebrating the fact that the Messiah has arrived and that through his your sins are forgiven.Jewish answer:The only reason a Christian might want to observe a Jewish festival would be to understand today's Jews a little better, and maybe some misconceptions might disappear. Otherwise, there is no spiritual reason.
Shavuot is a Jewish religious holiday.
Sometimes Christians fast, but they don't do it for festivals. Some Jewish people used to fast in the Old Testament times. I'm not sure if modern time Jewish people do or not.
See the attached Related Link for a list. See also Leviticus ch.23, where all of the Torah's Festivals are listed.
This entirely depends on what "stuff" you celebrate.Here are the major Jewish festivals: http://judaism.answers.com/jewish-holidays/the-jewish-holidaysAnd a few other occasions:http://judaism.answers.com/jewish-philosophy/jewish-life-cycle-brit-bar-mitzvah-wedding-death-and-mourning
They originate from the Jewish east side of London
It's a Jewish last name.