2 U.S.C. § 198 : US Code - Section 198: Adjournment

Search 2 U.S.C. § 198 : US Code - Section 198: Adjournment

(a) Unless otherwise provided by the Congress, the two Houses
shall - 
(1) adjourn sine die not later than July 31 of each year; or
(2) in the case of an odd-numbered year, provide, not later
than July 31 of such year, by concurrent resolution adopted in
each House by roll-call vote, for the adjournment of the two
Houses from that Friday in August which occurs at least thirty
days before the first Monday in September (Labor Day) of such
year to the second day after Labor Day.
(b) This section shall not be applicable in any year if on July
31 of such year a state of war exists pursuant to a declaration of
war by the Congress.