Passover begins this evening. President Obama has made it a practice to host a Passover Seder in the White House every year, building on a Seder he attended in Pennsylvania during the 2008 primary season when he was first running for President. That Seder, in a hotel, was organized by Jewish members of his campaign staff. The Forward reports that this year the President's Seder will be late since he is in Saudi Arabia through this weekend attending a regional cooperation summit. So the White House Seder will be held next week, still during Passover but not on one of the first two nights when Seders are usually held.
UPDATE: Here is the President's Passover message to the Jewish community, noting that this year will be their last Seder in the White House.