5e doesn’t have an official farmer background. But our homebrew background is perfect for a sensible worker of the fields who feels called to adventure.
The land is your home and your work. From sunrise to sunset, you work the fields, husband animals, and complete the chores to keep your farm running. Your dedication has taught you much about the world and how it works, and how to survive its sometimes harsh realities. Your resilience and adaptability make you a stalwart companion to whom people will turn in times of crisis. Whenever the troubles of the world overwhelm you, the land is always there, solid beneath your feet.
The farmer is a perfect background for the Monk: Way of the Fertile Field.