do your duty it is somebody's duty to do something have a duty to do something have a duty to somebody/owe somebody a duty sense of duty moral duty legal duty fail in your duty (= fail to ...
Love and Duty to Parents ... Was, "God be kind to the noble boy Who is somebody's son and pride and joy."
When you change somebody's schedule, On Duty asks you for a reason. If the reason you choose is associated with a time category (sick, vacation ...