Definition of banker's hours in US English:

banker's hours

plural noun

North American
  • Short working hours (in reference to the typical opening hours of a bank in former times).

    • ‘He had walked away from teaching in 1984, opting to leave the slow pace and banker's hours for a graduate assistant's job at South Carolina.’
    • ‘Also around Washington, there's a sniper working banker's hours, killing once then going home for the day.’