The first day of school after the holidays; the death penalty Monday, Black Monday (the day after Easter, 1360 on the day, the weather is cold, Edward III's soldiers were frozen to death in the vicinity of Paris).
The first day of school after the holiday; Monday execution of the death penalty; Black Monday (ie one day, because in 1360 the day, cold weather after Easter, Gaunt froze soldiers died near Paris).
A holiday after the first day of school; executed Monday; black Monday (the day after Easter, 1360 day, the weather is very cold, the soldier Edward III would freeze to death in the vicinity of Paris).