How often must Congress meet according to the U.S. Constitution?

Congress is mandated by the U.S. Constitution to assemble at least once each year. This requirement is established in Article I, Section 4, which states that "The Congress shall assemble at least once in every Year." This provision ensures that the legislative branch remains active and attentive to the needs of the nation, allowing for regular and timely discussions about government operations, legislative proposals, and issues affecting the country.

While there may be prolonged sessions or considerations for adjournment, the foundational principle is that Congress must convene annually to fulfill its duties. The other options imply either a less frequent assembly (every two years or every other year) or an unrealistic expectation (every month), which do not align with the constitutional directive of at least one meeting per year.