Judaism has several holidays lasting a week (or more) each.
Hanukkah is eight days.
Passover is one week.
Sukkot is eight days.
the Ten days of Repentance is ten days.
There are many holy days in Judaism.
Holy days where work is either not permitted (nw) or should be avoided (a):
It is called Shabbat. They celebrate it from Friday to Saturday.
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They don't "need" holy days, they have them just like almost all religions but they are not strictly speaking necessary. Christians' holy days aren't necessary. What to you mean by "need"? as in why do they practice them or what is the point?
They brought them together by bringing together the jews on the most holy days. They did this because in the jews religion during those holidays god watches over them and they have to try to erase all there bad sins so that they don't die that day.
The High Holy Days of Rosh Hashanah and Yom Kippur are celebrated by Jews because God commands us to celebrate them (Leviticus ch.23).
.Going to the Synagogue. .Praying to G-d. .Reading from, for example, the Torah. .Celebrating their Holy Days, such as Yom Kippur and Pesach. .They fast on some Holy Days, such as Yom Kippur.
No, not a whole month, but many days of observances, like Hanukkah, or Yom Kippur
channukah, yom kippor, rosh hashanah and more...
Sikhs and Jews do not share any of the same holy books.
Jerusalem is considered holy by Muslims, Jews, and Christians.
The sabbath!
No the Jews do not believe in the holy spirit, as Jesus said I will send my comforter inmy place to guide you. And as the Jews did believe in Jesus the holy spirit means nothing to them.