CNN  —  While holidays are often marked by parties, shared meals, gift-giving and special outfits, experts say there’s health benefits to remembering the meaning behind the celebration. The three-day holiday of Eid-al-Adha commemorates the story in the Quran of God appearing to Ibrahim, or Abraham, in a dream and commanding him to sacrifice his son as an act of obedience. The holiday, which starts on Friday this year, is determined by the lunar calendar, and Saudi Arabia announces the dates