The Jewish people celebrate all the holidays given to us by G-d in the Torah(i,e Passover and Yom Kippur) and a few other holidays added through time that tell of our past (i.e Hanukkah and Purim).
the Jewish holidays = החגים היהודים (pronounced "hakhagim hayehudim")
No.
There is a book by Morris Epstein (available through Abebooks) called All About Jewish Holidays and Customs.
Second Monday in October
This is completely untrue. Jewish holidays today are more important than ever to Jews, regardless of which country they live in.
His father is Jewish and his mother is from a Christian background. He was raised celebrating many Jewish holidays.
See these two links: http://judaism.answers.com/jewish-philosophy/jewish-life-cycle-brit-bar-mitzvah-wedding-death-and-mourninghttp://judaism.answers.com/jewish-holidays/the-jewish-holidays
Both are Jewish holidays.
There are more than 20 holidays that fall in every season.
His father is Jewish and his mother is from a Christian background. He was raised celebrating many Jewish holidays.
Religion isn't part of Harry Potter but considering he doesn't celebrate Jewish holidays then probably not.
On Sabbaths and Jewish holidays. (The holidays can occur on any day of the week.)