Why did the slaves not rebel during the holidays and how did the slave owners manage them from rebeling during the holidays

Douglass's term of service to Covey ended on Christmas Day, 1833. The time between Christmas and New Years was always given to slaves as a time for merrymaking and leisure, but the masters tried to make sure that the slaves got as debauched as possible so they would believe that freedom was a hassle and was unhealthy. These holidays were always given, however, because they were known among the slaveholders as a way to prevent insurrection. They were "conductors, or safety-valves, to carry off the rebellious spirit of enslaved humanity."