6 Facts About the Passover Holiday This year’s Passover celebration falls on April 19 and ends on April 27. Whether you’re personally participating or not, it’s important to understand this significant Jewish holiday. Here are six key facts to help you out. 1. Why is Passover celebrated? 2. When is Passover? 3. What is a Haggadah? 4. What is a seder? 5. What are traditional Passover foods? 6. What foods cannot be eaten?