conditional adjournment - When Congress adjourns for more than three days, authority is often provided the Speaker and President Pro Tempore (or the Senate Majority Leader) to reconvene Congress at an earlier date to address an emergency or important issue. This authority is provided in the concurrent resolution authorizing the conditional adjournment.
Congressional Sessions lists all Congresses and corresponding years - from 1789, when the 1st Congress met, through the current Congress.
You can access legislative information, by bill number or key words, from the THOMAS Web site. Information from the present back to the 93rd Congress (1973) is available on THOMAS.
For information on the Senate, Congress, the legislative process and the federal government, the Virtual Reference Desk is a good place to begin.