NEW YORK—New York will host a concert in Central Park featuring an undisclosed line-up of major musical artists in August to mark the city’s comeback from the coronavirus pandemic, Mayor Bill de Blasio said on Monday. The live music event is part of a week-long citywide celebration of the city, which was once the country’s epicenter of the pandemic. “This is going to be an amazing, memorable once-in-a-lifetime week in New York City,” the mayor told a news conference. De Blasio did not announce a line-up or a date for the concert, although the New York Times reported it is tentatively set for Aug. 21 in Central Park’s Great Lawn. Clive Davis will pull together the huge event that will feature an “all-star” roster of artists, according to de Blasio. The Times reported that the concert will have vaccinated and unvaccinated sections, with about 70 percent of tickets going to vaccinated …