Sleeping through the night without interruptions is essential for feeling refreshed and productive. However, many people often wake up between 3:00 AM and 5:00 AM and struggle to fall back asleep. This pattern is not random but has both historical and physiological significance.

This period is sometimes referred to as the “hour of the wolf,” a term popularized by Swedish filmmaker Ingmar Bergman. He described it as the time between night and dawn when sleep is deepest, nightmares feel most real, and many people pass away. Swedish folklore also associates this hour with an increased likelihood of births and deaths.

During these early morning hours, the body reaches its lowest physiological state—core temperature, blood pressure, and metabolism slow down as part of the circadian rhythm. For those prone to anxiety, this phase can intensify negative emotions, making it harder to stay asleep.

Many cultures link this timeframe to supernatural activity, often calling it the “witching hour.” Whether influenced by folklore or biological processes, waking up at this time can feel unsettling, especially for those who experience anxiety.