What is the only day that congress has to meet(at a minimum) annually?

The First Monday in December.

“The Congress shall assemble at least once in every Year, and such Meeting shall be on the first Monday in December, unless they shall by law appoint a different day”

b

make me

first industrial revolution - the first wave of the industrial revolution lasted from the late 1700s to the mid-1800s. it industrialized the manufacture of textiles and began the move of production from homes to factories. steam power and the cotton gin played an important role in this period.