June 17, 2021
On Thursday, June 17, 2021, the President signed into law:
S. 475, the "Juneteenth National Independence Day Act," which designates Juneteenth National Independence Day as a legal public holiday.
Joseph R. Biden, Jr., Press Release: Bill Signed: S. 475 Online by Gerhard Peters and John T. Woolley, The American Presidency Project https://www.presidency.ucsb.edu/node/350499