[Steve Van Doorn]

said, "The constitutionally fixed date is January 20. However, the constitution gives congress the ability to set election dates and they have (11/3, 12/8, 12/14). Congress could theoretically overturn that, but that would require passing a law"

Those other dates other then January 20 are not law those are recommended days that we've lived up to.

What you're missing is this 45 days after the election (December 18th) on foreign interference in our elections will be reported on by DNI and DHS.
Also according to Sara Carter Durham is now looking into post 2020 election.

Executive Order on Imposing Certain Sanctions in the Event of Foreign Interference in a United States Election signed on -- September 12, 2018

"Section 1. (a) Not later than 45 days after the conclusion of a United States election, the Director of National Intelligence, in consultation with the heads of any other appropriate executive departments and agencies (agencies), shall conduct an assessment of any information indicating that a foreign government"
https://www.whitehouse.gov/presidential-actions/executive-order-imposing-certain-sanctions-event-foreign-interference-united-states-election/

What i find most interesting in all this. The Kraken report which is very accurate on foreign interference they can't get a judge to listen to them. This shows a major problem with our court system. Though they do need the Kraken to be heard at a higher court which that is where they're taking it. It will likely take longer then the 18th this month.

[Boise3981]

Those other dates other then January 20 are not law those are recommended days that we've lived up to.

They are the law.

The date of the general election (this year 11/3) is set in 3 U.S.C. §1
Safe harbor date (this year 12/8) is set in 3 U.S.C. §5
The electoral college vote date (this year 12/14) is set in 3 U.S.C. §7

They're very much law and not merely some "recommendation" or "request". The vote happens. That's it.