What work did peasants owe the lord on the land he kept for himself, and when was most of it demanded?

Explanation

The lord's own fields could not be worked without the village, so each household owed a fixed number of days every week and further days when everyone was needed at once, at the two points in the year when the work would not wait. Turning out in arms is the closest trap, because service for land is the thread running through the whole period, but that duty belonged to tenants holding land on military terms rather than to peasant households.