Final answer:
The Congress is required to meet at least once every year. The first meeting of Congress begins on January 3 unless specified differently. The 20th Amendment changed the opening day of Congress from the first Monday in December to January 3.
Step-by-step explanation:
The Congress is required to meet at least once every year. According to the Constitution, the first meeting of Congress begins on January 3, unless the members specify differently. The 20th Amendment, passed in 1933, changed the opening day of Congress from the first Monday in December to January 3.