If you get manic in spring, it’s not SAD

The core difference is what happens when the season changes. SAD goes away. Bipolar (seasonal pattern) flips into hypomania or mania. Atypical depression doesn’t track with seasons at all.

Late-winter SAD feels like hibernation—sleeping more, craving carbs, low energy, but you rally when the sun returns. Seasonal bipolar (often called “seasonal affective disorder” but really bipolar with seasonal pattern) looks similar in winter, but when spring hits you don’t just feel better—you feel too good. Racing thoughts, less sleep needed, sudden grand plans, irritability. That’s the red flag.

Atypical depression is a different beast. It’s reactive: you can feel temporarily better with good news, but it’s chronic and doesn’t follow the calendar. You might have heavy limbs, rejection sensitivity, and overeating, but there’s no clean winter-summer cycle.

Self-assessment questions to run through:

• In March or April, do you suddenly need 4 hours less sleep and feel wired?
• Do you get “hyper” or irritable when the weather turns?
• Have you ever had a week where you felt on top of the world, then crashed?
• Does your mood lift temporarily when something good happens (atypical depression) or only when the sun comes back (SAD)?
• Do your symptoms follow the exact same months every year?

If you said yes to the first two, you’re probably