Once each year for eight days.
Almost all Jews celebrate Hanukkah.
Yes, Jews celebrate Hanukkah in many different countries.
There are about 14 million Jews in the world, and most of them celebrate Hanukkah.
There are about 14 million Jews in the world and a large percentage of them celebrate Hanukkah.
Jews celebrate Hanukkah in all the countries they live in, which is most of the countries of the world.
The entire Jewish population, almost without exception. There are currently about 520,000 Jews living in Jerusalem.
Hanukkah is celebrated by Jews, not by countries (with the exception of the country of Israel, where it is a holiday in the school system). Jews live in most countries of the world, and wherever they live, they celebrate Jewish holidays including Hanukkah.
"Instead" implies that one thing is replacing another or that the two are corollaries of one-another. This is not the case. Jews celebrate Hanukkah contemporaneously with Christmas, but these holidays are different in celebration, meaning, and purpose. They have nothing in common other than that they are both in December.Religious Jews ignore Christmas; it is simply not something of any importance to them in much the same way that Christians ignore Hanukkah, Eid al-Adha, or Diwali (which are Jewish, Islamic, and Hindu holidays) because they are not relevant to their tradition. Jews hold that their savior is not yet born, so it would be improper to celebrate the birth of a false Messianic Candidate.
Hispanic Jews, also known as Sephardic Jews, celebrate Hanukkah in much the same way as Ashenanzic (European) Jews do. However, there are a few differences: only the head of the household may light the menorah (among Ashkenazim, each person lights a menorah); the traditional songs differ (though many Sephardi Jews often sing the Ashkenazic Ma'oz Tzur nowadays) and they have a tradition of eating dairy rather than oil-fried foods.
eight days
Oh, dude, like, millions of people celebrate Hanukkah worldwide. It's a pretty big deal in the Jewish community, you know? So, yeah, lots of latkes, dreidels, and menorahs lighting up the place during that time of year. It's like a whole festival of lights situation.
see: http://ohr.edu/yhiy.php/holidays/chanukah/ for many more Jewish Questions and answers see: http://www.chabad.org/474309