Facebook (NASDAQ:FB) is requiring the vast majority of its employees to work from home at least through the end of May and said it's canceling any large events until the summer of 2021.

In a blog post, Facebook CEO Mark Zuckerberg laid out the tech giant's plan to start bringing its employees back to work in the wake of the COVID-19 pandemic. In early March, Facebook ordered its workforce of nearly 45,000 full-time employees to work remotely. 

Woman working from home on her laptop wearing a mask.

IMAGE SOURCE: GETTY IMAGES.

Zuckerberg said employees who are uncomfortable returning to work in June, whether it's because they're in a vulnerable population, they have no child care because schools and camps are canceled, or for any other reason, can remain working from home at least through the summer.

Zuckerberg did say a small percent of its critical employees who can't do their jobs remotely, such as content reviewers working on counter-terrorism, suicide, or self-harm preventions, and engineers developing complex hardware, may be able to return to work sooner than the end of May.  

Even after Facebook employees are allowed to return to the office, Zuckerberg said the tech giant is canceling any large in-person events with more than 50 people through June of 2021. Some of the events will be virtual, the executive said. Facebook has a ban on business travel through at least June of 2020, he said. 

"Most Facebook employees are fortunate to be able to work productively from home, so we feel a responsibility to allow people who don't have this flexibility to access shared public resources first," wrote Zuckerberg. I hope this helps contain the spread of COVID-19 so we can keep our communities safe and get back up and running again soon."