The Metropolitan Opera has reserved sprawling gala performances, with dozens of singers, for festive milestones: the retirement of a longtime general manager, say, or the company’s 50th anniversary at Lincoln Center.

This moment, of course, is anything but festive. The coronavirus pandemic has swiftly reshaped life worldwide, and the Met, like theaters almost everywhere, has been shuttered since the middle of March, with no end in sight. It stands to lose up to $60 million just through next month, and it’s too early to say whether it will open its next season in September.

Yet on Saturday afternoon, the company summoned its estimable resources and put on a virtual At-Home Gala, which streamed live on its website (and remains available until 8 p.m. on Sunday).