President Joe Biden has ringed two days — May 1 and July 4 — on the calendar of every American. By the first deadline, he says he will force states to make every adult eligible for a Covid-19 vaccine. And if all goes well, sufficient citizens will be immunized to attend parties on Independence Day.President Joe Biden has ringed two days — May 1 and July 4 — on the calendar of every American. By the first deadline, he says he will force states to make every adult eligible for a Covid-19 vaccine. And if all goes well, sufficient citizens will be immunized to attend parties on Independence Day.