Holidays

A Jewish holiday or festival is a day or series of days observed by Jews as a holy or secular commemoration of an important event in Jewish history. In Hebrew, Jewish holidays and festivals, depending on their nature, may be called yom tov^[1] ("good day") (Yiddish: yontif) or Ḥagh/Chag ("festival") or ta'anit ("fast").

A "Yom Tov" has similar obligations and restrictions to Shabbat, with the exception that you can cook, carry, and transfer fire (from a pre-existing flame).

The origins of various Jewish holidays generally can be found in Biblical mitzvot 

(commandments), rabbinical mandate, and modern Israeli history.

http://en.wikipedia.org/wiki/Jewish_holiday