U.S. Code Notes
The Tuesday next after the 1st Monday in November, in every even numbered year, is established as the day for the election, in each of the States and Territories of the United States, of Representatives and Delegates to the Congress commencing on the 3d day of January next thereafter
Nothing in there about election season or anything other than "day".
And early voting complies with this by not counting the early votes until Election Day.