Nighttime is the period of darkness that occurs after sunset and before sunrise. During this time, the sun is below the horizon, and the sky is often filled with stars and the moon. Many animals, such as owls and bats, are more active at night, while others, like deer, may be seen at dusk or dawn. The temperature usually drops during nighttime, leading to cooler conditions. People often engage in various activities, such as sleeping, socializing, or enjoying nighttime events. City lights illuminate urban areas, creating a vibrant atmosphere, while rural areas may offer a peaceful, quiet environment under the stars.