Night is the most dangerous time of a Minecraft day. It lasts for around 7 minutes real-time.
Effects on gameplay
During night, the Moon is the primary source of natural light, but it only provides a light level of 4, making it very hard to see.
The primary danger during night are the hostile Mobs that spawn. Most of the Overworld's hostile Mobs will spawn in the darkness. This includes Zombies, Skeletons, Spiders, Endermen, Creepers, Spider Jockeys and Chicken Jockeys.
Slimes will also spawn during night in Swamp Biomes, though this actually depends on the moon's lunar cycle. During a new moon, no slimes will spawn, and during a full moon, the most slimes will spawn.
During night, Villagers will stay in their homes. Any Villagers that are caught out at night will still attempt to go indoors. Also during night, villages can experience sieges, where groups of Zombies will attempt to break down the Doors of the houses to kill the villagers.
During night, a player can sleep in a bed to skip the night if hostile mobs aren't too close.
- Do not venture outside at night unless you're familiar with the terrain, have a full set of good armor (preferably Iron), and have a weapon to defend yourself, such as a Sword.
- Be aware of your surroundings. Don't allow yourself to be potentially outflanked by mobs.
- If it's your first night, and you're unarmed and without armor, dig a 1X3 hole in the ground, and cap it with Dirt. You will be able to hide from hostile mobs until Dawn.
- The Night is one of the best times to harvest items commonly obtained from mobs, such as Rotten Flesh (Zombies), Bones and Arrows (Skeleton), Spider Eyes and String (Spiders).