The Congressional Calendars collection is includes the Calendars of the U.S. House of Representatives and History of Legislation and the Senate Calendar of Business. The Calendars of the U.S. House of Representatives and History of Legislation is prepared under the direction of the Clerk of the House of Representatives by the Office of Legislative Operations. It is published daily by 8:00 a.m. when the House is in session. The Senate Calendar of Business is prepared under the direction of the Secretary of the Senate by the Legislative Clerk. It is updated each day the Senate is in session.