NEW YORK—BNP Paribas is pushing back its return-to-office date for U.S. employees by nearly a month to the second week of February due to the Omicron variant, an executive at France’s largest bank told Reuters. Wall Street firms were among the first to encourage staff to return to offices, but a winter wave of COVID-19 infections driven by Omicron has forced many to rethink their plans and review their vaccination policies. “With what happened with Omicron, we wanted to go back into a more conservative mode. So we only have people in the office if there’s a business critical need for them to be in,” said Kevin Abraszek, head of HR change and transformation at BNP Paribas in New York. “Initially, we said that we would have continued that policy through mid-January. But we most recently extended that through to Feb. 7,” he said. Goldman Sachs Group Inc. recently delayed …