Based on some more research, it still seems to be a mixed bag.
In the classic Romero Zombie films, zombies are just as active during the day as the night. In the very first scene of the first movie, the main protagonist is attacked in a cemetary during the day. Other filmmakers have followed this trope.
In legends of Voudoun, only shamen had power over the undead, akin to what in game terms is referred to as turning, commanding or rebuking. Even when told to "sleep" or "rest" they typically only cease to move, not actually drowse off. They must be ordered to "lie down" to simulate sleep...
Incorporeal undead vary in activity during the day, but never are truly dormant. Variations seem more linked to the supernatural link of darkness to death & the weakening of supernatural boundaries with the fall of night. And being incorporeal, one could surmise their divestment of physical form means they'd be even less likely to be affected by "sleep" enchantments...although some specters crave the same things they wanted in life.
Cultures vary, however, in their views of the afterlife & unlife. Fallen warrior spirits in Valhalla exist much as they did in life- eating, drinking and sleeping like normal humans. In Greek mythology, though, you sometimes see references to the dead as being unsleeping.
Some undead types actually prevent their victims from sleep as they hunt, haunt, torture and harangue them- exhausting them to insanity or death.
In the classic Romero Zombie films, zombies are just as active during the day as the night. In the very first scene of the first movie, the main protagonist is attacked in a cemetary during the day. Other filmmakers have followed this trope.
In legends of Voudoun, only shamen had power over the undead, akin to what in game terms is referred to as turning, commanding or rebuking. Even when told to "sleep" or "rest" they typically only cease to move, not actually drowse off. They must be ordered to "lie down" to simulate sleep...
Incorporeal undead vary in activity during the day, but never are truly dormant. Variations seem more linked to the supernatural link of darkness to death & the weakening of supernatural boundaries with the fall of night. And being incorporeal, one could surmise their divestment of physical form means they'd be even less likely to be affected by "sleep" enchantments...although some specters crave the same things they wanted in life.
Cultures vary, however, in their views of the afterlife & unlife. Fallen warrior spirits in Valhalla exist much as they did in life- eating, drinking and sleeping like normal humans. In Greek mythology, though, you sometimes see references to the dead as being unsleeping.
Some undead types actually prevent their victims from sleep as they hunt, haunt, torture and harangue them- exhausting them to insanity or death.