WASHINGTON—President Trump signed executive orders to overhaul border and energy policies and end diversity programs across the federal government, unwinding signature Biden administration policies on the first day of his second term.

Among the executive orders Trump signed with a flourish in front of a cheering crowd Monday was one mandating that federal workers return to their offices five days a week.

We’re tracking the executive orders Trump signed on his first day in office, just hours after being inaugurated as president.