Everything in this paragraph sounds wrong. Except maybe the first sentence. (It is saying A Serf had a sad lot in life? I hope?) Being a Serf was rough. Being a Slave/Thrall was worse. Life expectancy was short. Only some folk lived well, the rest worked hard to make it happen. Yes, Medieval Books of Days listing all the Saints, and Feasts, and Holy Days. Slaves, peasants, & serfs toiled long and hard to make those possible for the Clergy and Nobility. This last sentence could only have been typed by someone who has never farmed. It isn’t even true today. On a farm there is always a task needing doing. ALWAYS.