From the Introduction: "Since the 20th Amendment was ratified, the oath of office for President of the United States has been administered every four years at noon on January 20. In 2021, the President-elect Joseph R. Biden and Vice President-elect Kamala D. Harris are to be officially sworn in at noon on Wednesday, January 20. Planning for the 2021 inauguration is being challenged by the ongoing Coronavirus Disease 2019 (COVID- 19) pandemic and the events at the U.S. Capitol on January 6, 2021, during Congress's counting and certification of the November 2020 presidential election electoral votes. Inauguration security and operations adjustments to traditional ceremonies, customs, and practices are being made. This In Focus presents information related to 2021 inauguration security and operations based on past inaugural activities and announced activities to date. Additional security details are expected to be implemented due to the Capitol security breach. This document will be updated if they are publicly announced."
CRS In Focus, IF11710
Congressional Research Service: https://crsreports.congress.gov/