All of the company's offices will be temporarily closed.
Workers were told in a message that the offices would reopen on the 21st.
It didn't give a reason for the change.
There were reports that large numbers of staff were quitting after Musk told them to sign up for long hours or leave.
The message said to refrain from discussing confidential company information on social media with the press or elsewhere.
A request for comment from thebbc was not responded to.
According to reports, Mr Musk told employees that they had to work long hours or leave the company.
The Washington Post reported that the firm's new owner told staff to sign the pledge if they wanted to stay.
The people who didn't sign up would get three months' pay.
A person who wished to remain anonymous said that they had resigned even though they were ready to take on more work.
When I was already working 60-70 hours a week, I didn't want to work for someone who would threaten me over email if I didn't work harder.