The search for chametz takes place Thursday evening, April 10. You may eat chametz until 10:43 a.m. on Saturday, April 12. All chametz should be destroyed by 11:41 a.m on Sat, April 12. The final nullification of chametz can be recited until 11:41 a.m. on Sat, April 12. Here is the nullification that is recited: "All leaven and anything leavened that is in my possession, whether I have seen it or not, whether I have observed it or not, whether I have removed it or not, shall be considered nullified and ownerless as the dust of the earth."