Sleeping through the night without interruption is ideal for feeling refreshed and productive. However, many people frequently wake up between 3:00 AM and 5:00 AM, struggling to fall back asleep. This pattern isn’t random—it has historical and physiological significance.

The “Hour of the Wolf”

This time frame is often called the “hour of the wolf,” a concept popularized by Swedish director Ingmar Bergman. He described it as “the hour between night and dawn … when most people die, sleep is deepest, nightmares are most real.” According to Swedish folklore, it’s also when births and deaths are most common.

The Body’s Deepest Rest

Between 3:00 AM and 5:00 AM, the body reaches its lowest physiological levels—temperature, blood pressure, and metabolism drop as part of the circadian rhythm. If you experience anxiety, this phase may intensify negative emotions, making it harder to stay asleep.

Links to Folklore and Anxiety

Some cultures associate this period with supernatural activity, calling it the “witching hour.” Whether due to folklore or biology, waking up during this time can feel unsettling, especially for those prone to anxiety.