A patient who goes to bed at 3:00 AM and wakes at 2:00 PM is exhibiting which of the following conditions?

The patient's sleep pattern, going to bed at 3:00 AM and waking at 2:00 PM, indicates a significant delay in their sleep schedule relative to the typical or socially accepted sleep patterns. This is characteristic of delayed sleep phase syndrome, which is a circadian rhythm sleep disorder where a person's sleep is delayed by two or more hours beyond the conventional bedtime. Individuals with this condition often struggle to fall asleep at a normal time and have difficulty waking up in the morning, leading to late sleep onset and late rising.

Those experiencing this syndrome often find that their sleep patterns do not align with societal norms, which can lead to challenges in occupational or social situations. This condition is distinct from other sleep disorders like excessive daytime sleepiness, advanced sleep phase syndrome, or narcolepsy, which have different characteristics and patterns related to timing or duration of sleep.