There are more than three Jewish holy days, but the answer you're looking for is Rosh Hashanah and Yom Kippur, which total three days. For more about these and the rest of the Jewish holy days and other occasions, see this linked page.
passover
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They are extra special holidays.
Yom Kippur
No. The High Holy Days are Rosh Hashanah and Yom Kippur.Hanukkah is a minor festival.See also:More about HanukkahThe Jewish festivals
We have more than 3 holy days/ holidays in norway, check them out here: http://www.timeanddate.com/norsk/kalender.html
Yom Kippur (Leviticus ch.23).See also:All Jewish holy days and occasions
The Jewish holy symbol is the five-pointed Star of David.
Ivanka Trump converted to Judaism prior to marrying her husband. According to all reports, she observes Jewish holy days.
In the United States many Catholics celebrate 3 holy days. These holy days consist of Solemnity of the Virgin Mary, Feast of the Assumption, and Solemnity of All Saints. If you would like to learn about additional holy days in Catholicism see the link below.
The book of Exodus IS one of the Jewish holy texts. It does not "observe" holy texts.