Yom Kippur is not really "celebrated" but it is perhaps the most important day of the Jewish calendar. On this day, Jews fast from sundown the evening before until nightfall (about 25 hours) and spend much of that time in congregational prayer. This fast includes abstinence from food, drink, bathing, sexual relations, wearing leather or elaborate jewelry, perfume or lotions.
Yom Kippur means the Day of Atonement. This is because on this day all of a person's sins are atoned for, by confessing them to those who you have wronged and seeking forgiveness in the days leading up to the holiday, and then seeking forgiveness from God.
We observe Yom Kippur (the Day of Atonement) because the Torah commands it (Leviticus ch.23). See also the Related Link.
Jews in California celebrate Yom Kippur the same way that Jews the world over celebrate Yom Kippur.
The Jews celebrate Yom Kippur and Hanukkah.
Jews live all over the world, and they're the ones that celebrate Yom Kippur.
Jewish Mexicans celebrate Yom Kippur.
Praying for God's forgiveness and fasting.
Yom Kippur
Jews
Jews don't have churches - they have synagogues, and yes, they go to synagogue during Yom Kippur.
No.
The holiday in question is YOM KIPPUR.
Yom Kippur also known as the days of Atonement is the holiest day of the year for Jews .
Yom Kippur is the day of atonement where Jews ask HaShem to forgive their mistakes of the previous year.