As of election day today, there are 77 days left to POTUS current term in office.
77 days is equivalent to 11 weeks ending on January 19, 2021.
The day after is Wednesday, January 20, 2021 which is the 2021 United States presidential inauguration event and the 1st day of POTUS new term in office, officially beginning at high noon.
https://en.wikipedia.org/wiki/2021_United_States_presidential_inauguration
https://theconversation.com/the-presidents-term-ends-at-noon-on-jan-20-148065